
Fish & Aquatics
Treatments
Clear water. Happy fish.
Water conditioners and aquarium and pond treatments.
Find their favourites
More for fish & aquatics
Everything for fish & aquatics, one department at a time.
A little guidance
Choosing from our treatments range
Start with the part of the range that matches what your fish needs, then compare the available products and filters above.
Aquarium & Pond Treatments →
This aisle covers the products that keep aquarium and pond water safe and balanced, along with treatments for common fish health issues. Good water quality is the single biggest factor in keeping fish healthy, so this is one of the more important sections in the fishkeeping range rather than an optional extra.
Everyday water care
Tap water conditioners are the most commonly used product here, treating chlorine and chloramine out of tap water before it goes anywhere near fish, since both are harmful in the concentrations found in mains supply. These are used every time you do a water change, which makes them one of the most regularly bought items in this aisle.
Beyond conditioners, general water balancers help keep pH and hardness in a stable range, which matters because fish generally cope better with consistently moderate water conditions than with water that swings between extremes, even if those extremes are individually within an acceptable range.
Treating common problems
This aisle also covers targeted treatments for issues such as fungal infections, parasites and fin rot, most of which are added directly to tank or pond water rather than given to a fish individually. Reading the product's instructions for dosing and any timing around filtration is worth doing carefully, since most of these treatments interact with a tank's filter or other livestock.
A fish or pond showing signs of illness is always worth a closer look before reaching for a treatment, since the wrong product for the actual problem wastes time while the issue continues. Where you are not sure what you are dealing with, it is worth researching the specific symptoms or asking an experienced fishkeeper before treating.
Common questions
Do I need a water conditioner for every water change?
Yes, tap water conditioner should be used every time you add fresh tap water to a tank or pond, since it neutralises chlorine and chloramine that are otherwise harmful to fish at the levels found in mains water.
Can I use an aquarium treatment in my pond?
Not automatically. Ponds hold far more water and often house different species, so check that a treatment is specifically labelled for pond use before buying, rather than assuming a tank product will scale up.
How do I know if my fish need a treatment?
Look closely at any change in behaviour, appearance or eating before choosing a product, since treating the wrong problem wastes time while the real issue continues. If you are unsure what you are seeing, it is worth researching the specific symptoms first.
Will a water treatment affect my filter?
Some treatments can affect the beneficial bacteria in a filter, so it is worth reading the product's instructions carefully around dosing and timing, particularly for anything treating a bacterial or parasitic issue.
















