I have a 26 gallon bowfront with three zebra danios, nine harlequin rasboras, and one emerald cory. I would eventually like to get a dwarf gourami. I was going to get three more rasboras, but then I thought about long- finned danios. If I get three of those instead of the rasboras would that be okay? Or will there be a problem with fin nipping, or overstocking?