buddha1200;4576960; said:On my 125 oscar tank i do 50% twice a week,and have never had a bb crash,that tank is filtered with a marineland c-360 canister,aquaclear 110 and a 20 gallon sump(800 gph),the reason i do 50 % twice a week is they are poop factories and my nitrates get to 40ppm from 10ppm in 4 days but the ammonia and nitrate stay at 0ppm so i dont agree that that will case the cloudy water or maybe i am just lucky.
With all those filters + Sump, you wouldn't have to worry too much about a BB crash. Most of the BB would be well settled in the filter media, even if you are doing what is technically 100% WC's a week.