I found out that it's ok to put a male and a female together put please don't never put a male and a male together one of the males will hurt the other male. And you never want to put any small fish in the tank with the Betta's because the Betta's will eat them.The very MAX you should put in your tank, 10 inches worth of SMALL fish, NOT one 10 inch fish.Please remember that the 10 inches refers to to the size the fish will reach in ADULTHOOD. At the most you can put in; 6 Tetra's OR 3 Platiesor 3 or 4 Dwarf puffers or 5 pygmy corries and 4 endlers livebearers etc. Remember most fish are schooling fish and need to be kept with at least 4 -6 others of the same type.Betta's are slow moving fish with very long fins, so they can't be kept with any quick fish that have a reputation of fin-nipping, like zebra danios. They get along *great* with most variety of tetras, and I raise my baby fish with baby neon's all the time. Mollies and platies and other of that variety also work well. I've had bad experiences before though with keeping bettas and guppies, as the male bettas will mistake a male guppy tail for its own sort and fight. No goldfish. Goldfish come from cold water and bettas from very warm water, so their temperature requirements are very far apart, and also their general water conditions. Goldfish are very heavy water pollutants and require an absolute minimum of an inch and a half of fish per gallon of water (the usual way to estimate how many fish in a tank is one inch per gallon).
When mixing bettas in a community tank, the thing to keep in mind with bettas is that they are fish that originally came from very an area with slow moving water. So any type of major filtration on the tank will shock a Betta and make him hide in a corner away from the current. You have to balance this with the other fish in the tank that require the current and bubbles for the oxygen in the water for them to live. On the other hand, once a Betta gets used to the "current" from a filter, you will sometimes see the Betta 'playing' in it for fun. Just make sure that there is a quiet area in the tank for the Betta to move to when they are tired.Some possible tank mates for him in the bigger tank would be neon tetras, Cory cats, cherry barbs, rasboras, platies, and khuli loaches. Start slow with just the Betta until the tank completes it's nitrogen cycle and do some reading about new tanks so you know what to do to do I hop I have helped.......
