I recently started a 75G tank, all the fish a bought were about 3.5 inches. I have 1 male EBJD, 1 female JD, 1 pair of blue acaras, 1 tiger oscar and 1 male GT. I have 1 100G canister filter, 2 70G hanging filters,1 sponge filter and 2 55G UV sterilizers. I do 1 33% water change every week. I'm wondering how fast they will grow and how big a tank I will need for them as adults?