I have a 20 gallon long tank and my plan was to do a fishless cycle and then have neon tetras in it. I have a Betta fish in a bowl (he lived at my work) and I feel really sorry for him. I've decided I want him to live out the rest of his life in the 20 gallon and then I'll have the neon tank that I want. Can I cycle the tank with him in it or should I do a fishless cycle and keep him in his bowl. His bowl is about 1.5 gallon and not heated. I also have a Betta in a 2.5 gallon bowl (Marina 360 with a filter and heater). I realize that this is too small for him, but I really can't upgrade him too at the moment. What should I do?