My stock list has grow since my profile. I have 5 acie, 3 red empress, 5 Kennie (2 adults 3 fry), 8 labs (mixed in size), two Pecos and one syno (one had his eyes plucked out last night and died). With all that the tank is incredalby peacefull. Wish I never got the Kenni... I worried that I'll get over stocked running two 2217's, I do water changes at 30% every two weeks and don't want to do more. I used purigen and pura in the filters and the parameters are good.