I'm planning a new tank for the new year. I'm considering 30 or 45 gallon, haven't decided yet. At first I was planning it around my Betta and was researching to see if he was compatible with any other fish.
I purchased the book "Your Happy Healthy Pet - Betta 2nd Edition" by John H. Tullock. He lists several types of freshwater fish he claims are compatible with Bettas: Coolie Loach, Glass Catfish, and Rasboras. He also listed several types of Gourami (Blue, Croaking, Dwarf and Pearl) which surprised me. In all the research I've done on this, John Tullock is the only source I've found that thinks the Gourami and the Betta can live peacefully together. He states, "makes a great companion to the Betta in a sufficiently large aquarium." Is that because of the size of the tank? I don't think I want to take the chance. Does anyone in the forum know for sure whether they can cohabitate in the same tank?
I have two Corys in his tank now. The only problem they have together is at meal time for the the Corys. I feed them one sinking wafer a day. I feed the Betta 3 Hikari Betta pellets twice a day. Every time I put a wafer in the tank, my Betta wants that too! He has an incredible appetite!