I have a 35 gallon that I want ot put firemouths in. I have 2 serpae tetra and a very small sailfin pleco. I am going to get rid of the pleco before he gets too big. I plan on buying 2 or 3 more serpae. I want to get a pair of firemouths to breed them. I will have the tank set up correctly for them. Will this work? If not, will not getting more serpae help?