Thank you celebrist but I’m not worried about eliminating how often I have to do my water changes. I’m worried about how many fish the tank equipment can hold and there waste raising ammonia, nitrite, and nitrate levels and my fish dying because I don’t have enough filtration. I’m just asking with extra slots for filter cartridges and adding some plants if that will be enough to keep my fish safe I plan on doing my water changes every week and if I add more fish twice a week. I did twice a week for my 40breeder I had a 9inch Florida gar, a 6inch Senegalus, a German blue ram, 2 gouramis, a 10 inch comet goldfish, and a brittle nose pleco. With just a large anbiaus and a 50 gallon filter, a 30 gallon filter, and a 10 gallon filter with a air pump and my water was great. I’m just nervous because it’s been a long time and I never had 2 Senegalus before or a 55 gallon. So I want to make sure everything goes right and nobody drops dead on me.