NT Labs Anti-Fluke and Wormer
Fast-acting, ready-mixed flubendazole treatment for skin flukes, gill flukes and intestinal worms in tropical and coldwater aquariums. Harmless to filter bacteria.
20ml · 200ml
Genuine NT Labs · Stocked in South Africa
NT Labs. British-made aquatic science. Now in South Africa.
Test kits, treatments and water conditioners from NT Labs' British-made range — stocked locally by Jungle Aquatics and delivered across South Africa.
Est. 1982 · Made in Britain
The experts inFish Health
1982Fish-health experts since
VMDFirst UK-licensed fish medicine maker
GMPPharma-grade manufacturing
Nationwide delivery
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Seven ranges, one system: test the water, treat the problem, then keep it that way. Jump straight to the products you need.
Aquarium Treatments
9 productsTargeted medicines for white spot, fungus, fin rot, internal bacteria and parasites. Dose by true volume, remove carbon, finish the course.
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NT Labs Anti-Internal Bacteria
Treats internal bacterial infections caused by Pseudomonas, Aeromonas and Vibrio in tropical and coldwater aquariums. Works deep inside the fish and is harmless to filter bacteria.
100ml · 250ml
NT Labs Anti-Parasite
Single-dose treatment for Trichodina, Costia and Oodinium, the protozoan parasites behind velvet and slime disease. Harmless to plants and filters; not safe with shrimp, snails or other invertebrates.
100ml · 250ml · 1L
NT Labs Anti-Ulcer and Finrot
Broad-spectrum, single-dose antibacterial for ulcers, fin rot and mouth rot caused by bacteria such as Aeromonas and Pseudomonas. For tropical and coldwater aquariums.
100ml · 250ml · 1L
NT Labs Anti-White Spot and Fungus
A 7-day course — four doses on alternate days — that eradicates white spot (ich) and cotton-wool fungal growths in tropical and coldwater aquariums. Harmless to filters and plants.
100ml · 250ml
NT Labs Aquarium Disease Solve 100ml
General treatment that keeps disease-causing pathogens under control in tropical and coldwater aquariums, and can disinfect live foods. Harmless to filter bacteria, fish and plants. Treats 500 litres.
NT Labs Methylene Blue 100ml
Classic remedy for bacterial, fungal and some external protozoan infections of fish, fry and eggs in coldwater and tropical aquariums. Most effective in a quarantine tank or treatment bath.
NT Labs Octozin 250ml
A targeted three-day course for Hole-in-the-Head disease and Bloat in coldwater and tropical fish — particularly useful for cichlid keepers.
NT Labs Swimbladder Treatment
Single-dose treatment for internal bacterial infections of the swimbladder that cause unstable, irregular swimming. Harmless to filter bacteria; for tropical and coldwater aquariums.
100ml · 250ml
Aquarium Lab · Test Kits
8 productsFreshwater testing for the numbers that keep fish alive: ammonia, nitrite, nitrate, pH, hardness and phosphate.
NT Labs Aquarium Lab Multi Test Kit
Six liquid tests in one box — ammonia, nitrite, nitrate, pH, GH and KH — with an integral test-tube rack. 200 tests across the six parameters for freshwater aquariums.
NT Labs Broad pH 6-9 Test Kit
Liquid-reagent pH test covering the 6–9 range in 0.5 steps, for ponds and aquariums. Contains 40 tests.
NT Labs GH KH Hardness Test Kit
Measures general hardness (GH) and carbonate hardness (KH) — the water's buffer against pH change — in ponds and freshwater aquariums. Up to 80 tests.
NT Labs Narrow pH 6-7.6 Test Kit
Fine-resolution pH test for the 6–7.6 range, for fish with specific pH needs and neutral tropical community tanks. For ponds and freshwater aquariums; 40 tests.
NT Labs Nh3 Ammonia Test Kit
Tests for ammonia (NH3) — the main fish waste product and the first sign of a struggling filter — in ponds and freshwater aquariums. Liquid reagents; 40 tests.
NT Labs No2 Nitrite Test Kit
Tests for nitrite (NO2), produced as filter bacteria break down ammonia, in ponds and freshwater aquariums. Liquid reagents; 40 tests.
NT Labs No3 Nitrate Test Kit
Tests for nitrate (NO3), the end product of the nitrogen cycle, which fuels algae at high levels. For ponds and freshwater aquariums; liquid reagents, 30 tests.
NT Labs Po4 Phosphate Test Kit
Tests for phosphate (PO4), a nutrient from fish food that drives algae growth, in ponds and freshwater aquariums. Liquid reagents; 40 tests.
Water Care & Filter Start
9 productsConditioners, live filter bacteria and maintenance helpers — including NT Labs' Optimus and Satus ranges.
NT Labs Aquarium Algae Gone
Single-dose, plant-friendly clarifier for green or cloudy aquarium water: it clumps fine particles together so the filter can strain them out. 100ml treats 500 litres.
100ml · 250ml
NT Labs Aquarium Cleaner 100ml
Blend of enzymes and bacteria that digests sludge from fish waste and uneaten food, reducing the risk of disease and algae while supporting filter bacteria. Treats 500 litres.
NT Labs Aquarium Filter Starter
Live culture of friendly filter bacteria that breaks down fish waste and prevents toxic ammonia and nitrite build-up. Use for new tanks, new fish, and after filter cleans or medication.
100ml · 250ml
NT Labs Aquarium KH Up - PH Stabiliser 180g
Safely raises carbonate hardness (KH) to stop the pH swings that come with low KH. 180g treats 1 500 litres.
NT Labs Aquarium Liquid Filter
Natural-ingredient clarifier that helps remove pathogenic bacteria, harmful compounds and odours, leaving water visibly clearer. Useful after a disease treatment or a water change.
100ml · 250ml
NT Labs Aquarium Tap Water Safe
Removes chlorine, chloramine and heavy metals from tap water, with colloids that reduce stress when transporting or introducing fish. For tropical and coldwater aquariums.
100ml · 250ml
NT Labs Optimus Water Conditioner
Concentrated dechlorinator and conditioner for freshwater and marine tanks: removes chlorine and chloramine, and detoxifies ammonia, nitrite, nitrate and heavy metals. 100ml treats 4 000 litres.
100ml · 250ml · 500ml
NT Labs Plastic Plant Cleaner
Fizzing tablets that lift algae and organic deposits from plastic plants, ornaments and equipment — soak them in a bucket for at least 8 hours. Five cleans per pack.
NT Labs Satus Filter Start
Fast-maturing filter culture for freshwater and marine aquariums: rapidly removes ammonia and nitrite to prevent new tank syndrome. Harmless to fish and plants, and cannot be overdosed.
100ml · 250ml · 500ml
Marine Range
4 productsTreatments formulated for saltwater systems — bacterial issues, flukes, parasites and aiptasia control.
NT Labs Marine Anti Bacterial
Treats bacterial infections in marine aquariums — reddened wounds, ulcers, missing scales, and eroded fins or mouths. Remove carbon and switch off UV while dosing.
100ml · 500ml
NT Labs Marine Anti Fluke and Wormer 20ml
Flubendazole treatment for worms and flukes in marine fish — signs include weight loss, clamped fins and rubbing. Not safe with snails, shrimp or other invertebrates.
NT Labs Marine Anti Parasite
Chelated copper and formalin treatment for marine white spot (Cryptocaryon) and velvet (Oodinium). For fish-only and hospital tanks — not safe with corals, invertebrates or live rock.
100ml · 500ml
NT Labs Marine Anti-Aiptasia
Pesticide-free contact solution, applied by syringe, for eliminating Aiptasia and Majano pest anemones in marine aquariums. Do not apply directly to corals.
Marine Lab · Test Kits
10 productsReef-grade testing: calcium, KH alkalinity, magnesium, pH and the full nutrient suite for marine systems.
NT Labs Ca Marine Lab Calcium Test Kit
Titration test for calcium — the element corals, clams and calcareous algae build their structures from. Includes reagents, titration vessel and instructions.
NT Labs Marine Lab KH Alkalinity Test Kit
Measures carbonate hardness (KH), the water's buffer against pH swings, to keep alkalinity stable for fish and corals in marine aquariums.
NT Labs Marine Lab Multi Test Kit
Four liquid-reagent tests for marine aquariums — ammonia, nitrite, nitrate and pH — with a test-tube rack and full instructions. 155 tests combined.
NT Labs Marine Lab pH Test Kit
Liquid-reagent pH test with colour chart, for keeping marine aquarium pH stable within the range your livestock need.
NT Labs Marine Lab Reef Multi Test Kit
Reef chemistry in one box: KH, magnesium, calcium and phosphate, using liquid drop and titration tests with syringes, pipettes and vessels included. 145 tests combined.
NT Labs Mg Marine Lab Magnesium Test Kit
Titration test for magnesium, which corals and invertebrates need in order to take up calcium. Keeping it in range supports coral growth and prevents calcium precipitation.
NT Labs Nh3 Marine Lab Ammonia Test Kit
Liquid-reagent ammonia test with colour chart and clear instructions — the essential safety check for fish in marine aquariums.
NT Labs No2 Marine Lab Nitrite Test Kit
Liquid-reagent test for nitrite, a harmful by-product of nitrification, to keep marine fish and invertebrates safe. Includes reagents, test tube and colour chart.
NT Labs No3 Marine Lab Nitrate Test Kit
Liquid-reagent test for nitrate, the end product of nitrification, which builds up over time, affects coral health and feeds algae in marine aquariums.
NT Labs Po4 Marine Lab Phosphate Test Kit
Liquid-reagent test for phosphate in marine aquariums — a necessary reef nutrient that, in excess, causes algae blooms and inhibits coral growth.
Axolotl Care
4 productsThe Axo range: water safety, tonic salts, gentle remedies and filter bacteria formulated for axolotls.
NT Labs Aquarium AxoCure 100ml
Gentle, gill-safe medicine bath for axolotls, treating monogenetic trematodes (flukes), Ichthyobodo and Chilodonella. 100ml makes ten 2-litre baths.
NT Labs Aquarium AxoSafe 100ml
Pure, aloe-vera-free dechlorinator for axolotls: removes chlorine, chloramine and heavy metals from tap water. Use for new tanks, water changes and in transport bags.
NT Labs Aquarium AxoTonic Salt Mixture 500g
Balanced salt mix tailored to axolotls: adjusts the pH, KH and GH of tap or RO water and adds trace elements, helping to reduce fungal infections and support recovery.
NT Labs AxoStart Bacteria 100ml
Pure, colourless filter bacteria for axolotl tanks: breaks down waste and converts ammonia and nitrite into safer nitrate. Use for new tanks, water changes and filter cleans.
Pond & Koi Care
6 productsSludge, duckweed, foam and koi health — the seasonal essentials for outdoor water and serious koi keeping.
NT Labs Barleyclear Liquid Barley Straw 250ml
Liquid barley straw extract that naturally controls green algae and blanket weed; fish and wildlife friendly. Best started before the water warms in spring. 250ml treats up to 4 550 litres.
NT Labs Cristalclear Duckweed Control 250ml
Removes phosphate, the nutrient behind duckweed's rapid spread, to help prevent build-up in ponds. Plant and wildlife friendly; 250ml treats up to 4 550 litres.
NT Labs Foam Control 250ml
Breaks down surface foam and froth caused by excess protein, improving gas exchange and helping to maintain pH. Safe for all fish and wildlife; 250ml treats 4 550 litres.
NT Labs Koi Care Argusol 500ml
Diflubenzuron treatment for fish lice (Argulus), anchor worm (Lernaea) and other crustacean parasites in koi ponds. Suitable for koi only; 500ml treats 18 200 litres.
NT Labs Pond Koi Ulcer Swab 100ml
Topical antiseptic swab for cleaning and disinfecting open wounds, sores and ulcers on koi and pond fish — the first step in wound care, before the wound is sealed.
NT Labs Sludgeclear - Sludge Remover 250ml
Blend of enzymes and bacteria that digests pond sludge, leaving a cleaner pond and filter with fewer places for disease organisms to hide. 250ml treats up to 4 550 litres.
The water guide
Healthy fish start with healthy water. Five short, practical explainers from the NT Labs way of doing things: measure first, treat precisely, maintain always.
The nitrogen cycle, decoded
Every aquarium runs on the same invisible engine. Fish waste breaks down into ammonia (toxic), friendly bacteria convert it to nitrite (still toxic), and a second colony converts that to far safer nitrate, which you dilute with water changes. When fish gasp, sulk or die "for no reason", one of those three numbers is almost always the reason.
Test weekly, and always after adding fish or medicating. You're aiming for ammonia at 0, nitrite at 0, and nitrate as low as practical — many keepers work to under 40 mg/l in freshwater, and far lower in reef systems. A multi-test kit covers the whole cycle in one box; single-parameter kits are the economical way to re-check a known problem.
White spot: act on day one
White spot (ich) is the classic new-fish disease: salt-grain specks on fins and body, flicking against rocks, clamped fins. The parasite's life cycle means the spots you see are only one stage — it must be treated in the water, over the full course, not just until the spots fade.
Treat the whole tank the day you spot it: dose by your aquarium's true water volume (length × width × height, minus rocks and substrate), remove activated carbon from the filter while medicating, and keep oxygenation high. Finish the full course even if fish look better — stopping early is how it comes back. Not sure it's white spot? Start with a general tonic and NT Labs' online diagnosis tool at nt-labs.com.
Start a new tank like a lab tech
"New tank syndrome" kills more fish than any disease: a young filter simply has no bacteria yet, so the first fish swim in rising ammonia. The fix is patience plus a head start. Condition tap water first — South African tap water is chlorinated, and chlorine kills the very bacteria you're trying to grow.
Then seed the filter with a live bacterial culture and stock slowly: a few hardy fish, then test ammonia and nitrite every couple of days. Only add more fish when both read zero for a week. A filter starter isn't just for new tanks either — re-dose after medicating, deep filter cleans or power cuts, whenever the bacteria have taken a knock.
Reef chemistry: the big three
Corals are chemistry projects. To build skeleton they draw calcium, carbonate (KH) and magnesium from the water in a fixed relationship — let one slide and the other two misbehave. Typical reef targets: calcium 400–450 mg/l, KH 7–11 dKH, magnesium around 1 250–1 350 mg/l.
Test weekly and dose to replace what your corals consume — steady numbers beat "perfect" numbers that swing. Add ammonia, nitrite, nitrate and phosphate tests during the first months of a new marine system, and keep an anti-aiptasia treatment on hand before the pest anemones spread.
Pond rescue: sludge, weed & foam
Ponds fail from the bottom up. Dead leaves and fish waste become a sludge layer that feeds algae blooms, duckweed carpets and that stubborn surface foam — and in South Africa's long warm season it accumulates fast. Clear the cause, not just the symptom: a sludge treatment digests the organic layer, barley straw liquid keeps water polishing itself between cleans.
For koi keepers, spring and autumn are checkpoint seasons: inspect fish as they feed, and treat parasites like argulus (fish lice) or topical ulcers early, when fish are strong. Keep a swab treatment in the kit — with koi, the fast response is the cheap response.
Why NT Labs
Made in Britain since 1982
Researched, formulated and manufactured by NT Laboratories in Kent, England — fish-health specialists since 1982.
Licensed, not just labelled
In 2007 NT Labs became the first UK manufacturer granted a Veterinary Medicines Directorate licence for small-animal medicines (SAM0001).
GMP-grade production
Products are made under Good Manufacturing Practice — the same discipline behind human and veterinary pharmaceuticals.
Test → treat → maintain
One coherent system: Aquarium Lab and Marine Lab kits to measure, targeted treatments to fix, conditioners and bacteria to keep it fixed.
Multi-award-winning
A range trusted and repeatedly awarded across the aquatics industry, from home aquariums to serious koi collections.
Stocked locally by Jungle Aquatics
No import wait, no customs surprises: the range is on the shelf in South Africa and couriered nationwide, with local support.
Questions, answered
NT Labs products are sold online in South Africa by Jungle Aquatics, an independent reseller based in Johannesburg. Every product on this page links to its listing on jungleaquatics.com, where you can order for courier delivery anywhere in the country.
NT Labs is a British fish-health brand from NT Laboratories Ltd, established in 1982 and based in Kent, England. It researches and manufactures aquarium, marine and pond treatments, water test kits and water conditioners under Good Manufacturing Practice, and in 2007 became the first UK manufacturer granted a Veterinary Medicines Directorate licence for small-animal medicines (SAM0001).
Yes. Everything on this page is genuine NT Labs stock — researched and manufactured by NT Laboratories in Kent, England — sold locally by Jungle Aquatics, an independent South African reseller.
On the product pages at Jungle Aquatics. Every product here links straight to the store, where pricing and stock are always current, and delivery costs are shown at checkout.
Yes. Jungle Aquatics couriers orders nationwide, from the major metros to smaller towns. Delivery options and rates are shown at checkout on jungleaquatics.com.
For freshwater aquariums, NT Labs Anti-White Spot and Fungus: a 7-day course of four doses on alternate days, for white spot and fungal infections in tropical and coldwater fish. For saltwater tanks, NT Labs Marine Anti Parasite treats marine white spot (Cryptocaryon) and velvet (Oodinium) — but it contains copper, so it is for fish-only or hospital tanks, not systems with corals, invertebrates or live rock.
Dose by your aquarium's true water volume: length × width × height in centimetres, divided by 1 000, gives litres — then allow roughly 10% less for rocks and substrate. Remove activated carbon from the filter while treating, follow the label exactly, and always complete the full course, even if fish look better sooner.
For freshwater, the Aquarium Lab multi test kit — or the ammonia, nitrite and nitrate singles — covers the numbers that matter most. For marine tanks, start with the Marine Lab multi kit, then add calcium, KH and magnesium kits once corals arrive. Single kits are the economical way to re-check a known problem.
They are made for different water. The freshwater kits — the Aquarium Lab multi kit plus single tests for ammonia, nitrite, nitrate, pH, GH/KH and phosphate — are for freshwater aquariums, and the single kits are also suitable for ponds. Marine Lab kits are for saltwater systems and add the reef parameters: calcium, KH alkalinity and magnesium. Choose the range that matches your system.
Weekly in a new aquarium and at least fortnightly once it is established — and always after adding fish, after medicating, or whenever fish look unwell. You are aiming for ammonia at 0, nitrite at 0, and nitrate as low as practical.
New tank syndrome is the ammonia and nitrite spike that happens when a new filter has not yet grown enough bacteria to process fish waste. Prevent it by conditioning tap water first, seeding the filter with live bacteria such as NT Labs Filter Starter or Satus Filter Start, stocking slowly, and testing ammonia and nitrite every couple of days until both read zero.
Yes — the Axo range is formulated for axolotls. AxoSafe is an aloe-vera-free tap water dechlorinator, AxoStart is a filter bacteria culture, AxoTonic is a salt mix that sets pH, KH and GH and adds trace elements, and AxoCure is a gentle medicine bath for external parasites.
Not all of them — some medicines affect invertebrates and sensitive species. For example, Anti-Parasite, Marine Anti Parasite and Marine Anti Fluke and Wormer are all labelled as harmful to shrimp, snails and other invertebrates. Every NT Labs label states what the product is and isn't safe with, so read it before dosing and move sensitive livestock if the label says so. If in doubt, ask the Jungle Aquatics team before you buy.
Use the pond-specific products instead. Pond volumes, temperatures and flow rates need different formulations and dosing rates, and NT Labs makes its pond and koi range for exactly that. Dosing a pond from aquarium bottles gets imprecise and expensive very quickly.
Cool, dark and sealed — a cupboard away from sunlight is ideal. Keep bottles tightly closed, never decant into unmarked containers, and replace test kits once the reagents pass their expiry date, because old reagents can read false.
Healthy water.
Happy fish.
The NT Labs range is ready to ship from Jungle Aquatics — South Africa's aquatics specialists.
Shop the NT Labs collection