if you look in my profile there is pictures of the tank im using minus the other fish but its still the same cave and plants and filter and heater, i have been slowly letting the water drop cuz i know they like it lower. Only reason im using the internal filter is because i cant use that one in my fry tank and my fry are currently using the sponge filter but that internal filter has a switch on it i can adjust the flow so its set to low. I have a air stone in there but it is off after he started blowing his nest. It would just be nice to be able to adjust the temp tho but its always at 78. When you put the female it do you rest her on the bottom in the jar or float her? You know what those plastic betta jars they use at like walmart? That is what im using to introduce her but she lives in my 20 gallon community tank when she not in his tank. Im gonna pull her out and float her for a day or two like you said, its kinda weird but i dont use nets with my bettas, i put my hand in there and they swim right in my hand and let me lift them out!! strange fish!!