Ich — white spot — is the most common disease in the hobby, and the good news is it’s very treatable if you act fast. Those tell-tale white grains scattered over your fish are a parasite with a life cycle you can break with the right medication and approach. This UK guide covers the best ich treatments in 2026.
Here’s how to beat it quickly.
- Ich (white spot) is the most common fish disease and very treatable if caught early.
- Treat the whole tank at the first sign — it spreads fast.
- eSHa EXIT and malachite-green treatments are proven UK options; halve the dose for scaleless fish.
- Remove carbon, add aeration, and complete the full course even after spots vanish.
Recognising ich
Ich looks like grains of salt or sugar dotted across the fins and body, often with flicking or rubbing against surfaces as the fish tries to relieve irritation. It spreads fast, so treat the whole tank at the first sign. Read our full ich guide for the life cycle.
Our top picks
Best all-round — eSHa EXIT. eSHa EXIT is a trusted, effective UK white-spot treatment that’s relatively gentle on fish.
Best traditional — malachite-green treatment. A malachite green / formalin treatment is a proven classic — dose carefully and use a half dose for scaleless fish.
Support the treatment. Add extra aeration with an air stone — treatments and warmth lower oxygen — and remove carbon first.
How to treat white spot
Remove chemical filtration (carbon) first, as it absorbs medication. Raising the temperature a couple of degrees speeds the parasite’s life cycle so the medication can hit it. Complete the full course even after spots vanish — the parasite is only vulnerable at one stage, and stopping early lets it return. Add aeration, and watch scaleless fish (loaches, catfish) closely as they’re sensitive. See quarantine setup to prevent future outbreaks.
Frequently asked questions
What is the best treatment for ich?
eSHa EXIT is a trusted, relatively gentle UK white-spot treatment, and malachite-green formulations are a proven classic. Remove carbon first, add aeration, and complete the full course.
How do you get rid of white spot fast?
Treat the whole tank at the first sign with a proven medication, remove chemical filtration, raise the temperature a couple of degrees to speed the parasite's cycle, and finish the full course.
Is ich treatment safe for all fish?
Most treatments are safe at the correct dose, but scaleless fish like loaches and catfish are sensitive — use a half dose for them and watch closely throughout treatment.
— Jaqline Smalling, FishForever
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