Platy has a lump and looks rough

Colin_T said:

The fish possibly has gill flukes and intestinal worms.

I can't see the lump on its eye. If you can post another picture it might help.

Your nitrates are a bit high. Check the nitrate level in your tap water and do more water changes on the tank.

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You can use Praziquantel to treat tapeworm and gill flukes. And Levamisole to treat thread/ round worms.

Remove carbon from filters before treatment and increase aeration/ surface turbulence to maximise oxygen levels in the water.

You treat the fish once a week for 3-4 weeks. The first treatment will kill any worms in the fish. The second and third treatments kill any baby worms that hatch from eggs inside the fish's digestive tract.

You do a 75% water change and complete gravel clean 24-48 hours after treatment. Clean the filter 24 hours after treatment too.

Treat every fish tank in the house at the same time.

Do not use the 2 medications together. If you want to treat both medications in a short space of time, use Praziquantel on day one. Do a 75% water change and gravel clean the substrate on day 2 & 3. Treat the tank with Levamisole on day 4 and do a 75% water change and gravel clean on day 5, 6 & 7 and then start with Praziquantel again on day 8.

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