Hello ! So recently ive made the decision to rehome all my mollies, they seem to take up alot of the bioload of my tank, I love them but I don’t think they’re for me. I am installing a second filter tomorrow, another Marineland Penguin 350B. After I rehome the mollies ill have an Opaline gourami, 9 zebra danios, 5 albino corydoras, 7 otocinclus catfish and 1 BN pleco. Those fish all get along great and my gourami is quite friendly even with the mollies I have now. Iv’e absolutely fell in love with my danios and want more schooling fish. I wanted to know what kind of schooling fish I could add and how many, the tank is planted and I do 40-50% water changes a week.