It sounds like your fish has slime parasite disease
How to be sure
Slime Parasites give your fish a coating of grey/white mucus over the body, the eyes can appear cloudy. It may shimmy, scratch, jump and flick against objects in the aquarium – like it’s trying to have a really good itch.
This disease stresses your fish and may make it prone to secondary infections such as fungus and fin rot.
Step 1 – Treat your fish
- Remove the carbon filter out of your filtration – but don’t forget to return it 7 days after the last dose.
- Use Anti Slime & Velvet treatment treatment, you can check the correct dosage for your aquarium size here. Do not use with scaleless fish or invertebrates.
- Also dose with Aqualibrium First Aid Salt – it helps boost your fish’s ability to fight the illness.
- Give your fish some time-out to recover – avoid excessive cleaning, re-decorating or adding new fishy friends.
- To re-treat, or treat another problem, follow the on pack guidelines for using more treatment.
Watch Out! – Treatments can sometimes reduce oxygen levels in the water. If you see fish gasping at the surface, you can increase oxygen by adding an air pump.