Who Gives A Fish Forums

Yo, same thing happened to my crew. Crushed coral fixed it in like two days. Also, check your filter media—sometimes it goes acidic if you don't rinse it enough.

Yep, quarantine tanks can work wonders. Had a stunted guy that blew up after a month in a 20 gallon with daily water changes. Also, try adding some almond leaves, the tannins seem to help 'em relax and eat more.

Yep, parasites are a sneaky culprit. Had a batch that stayed small for months, then treated with PraziPro and they ballooned. Also, how's the flow in the tank? Discus hate strong currents, might be stressing 'em out if your filter's too powerful.