Who Gives A Fish Forums

If you're doing everything right and they're still not growing, it might be worth isolating one or two in a smaller tank with perfect conditions. Sometimes they just need a reset to kickstart growth.

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.