I have 6 cardinal tetras so far. Planning on adding a few more of those. Heres the rest of what I plan on adding. Would these fish get along peacefully, and have the same needs? ~20 cardinal tetras 10 cory cats 6-10 galaxy rasboras 10 ottos 6 hatchetfish 6 halfbeak Possibly another school of small tetras, or rasboras. Black tetras, harlequin rasboras maybe? What do you think, In a 75 gallon heavily planted. Cascade 1000 filter.