dude pbass need special filteration b/c they are extremeyl large fish and with large messy fish you get crap water quality.... and YES PBASS EAT PELLETS... if u cant get them on pellets stuff them inside the cut up market prawn(which you should be feeding your pbass)... 6 months you will see a huge difference. also yes filteration has alooooottt to do with it, as so does nutttrrients! pellets, shrimps, silversides, smelts, beefheart( but kinda craps up the water) you can feed and feeders as a treat once a week... get them mainly on shrimps and pellts or pellets inside shrimps!.. hikiari is a good source.. u cant be ignorants for the peole here do no what they are talking about... get another filter on that tank. a large canister or a wet/dry. and a 90 gallon ahahah dude do you know the rule? 1 inch per 10 gallons for health fish. how do those fish even move in that tank? ur cuz needs about a 300gallon to a 500gallon for adult peacocks... thats why this site is called monsterfishkeepers.. bc with monster fish you need monster tanks! i dont mean to sound like an ***hole either. take the peoples advise on the site they do knwo what they are talking about.. so in conclusion... get soem melafix.... a better diet for your fish... better filteration .... and do quite a few small water changes frequently... and u shall be fine..... if you have more question ask them PLEASE and you can also PM me with anythgin you might have to say or ask me as well!