tyl089;1689457; said:Yeah, you got big fish with big appeitites, so you're going to have a big bio load.
but, if you say you don't have ammonia and nitrites, then your filers are doing it's job.
Nitrates are the end products of bio filtration. Have you thought about using plants in your aquarium or your filter set up? Or large water changes every 2-3 days should help.
what he said!!