Got a stupid idea a while back to put a couple of bettas in seperate vases with bamboo in it. Which turned into 2 one gallon tanks wich turned into a 10 gallon with filtration and a divider. Both Bettas eventually died. So now it has turned into 2 Mollys and some guppies. I think the Mollys are killing the guppies. They tend to be a little aggressive. I thouhgt they were a peaceful fish. What gives? The wife is mad and wants to get rid of the Mollys, I want to just take the guppies out or just get a bigger tank all together. I am not totally new to fish, I used to have a nice 55 galon tank with cichlids in it. I am in the military so when I moved I decided to sell it. I knew getting the 10 gallon was a mistake because it would make me want another 55+ gallon tank. Oh well a little late now. So what is the deal with the Mollys? Also the rule is 1 gallon of water per inch of fish right? I have added air going into the tank via decoration and such, but it is not the fine air bubbles like from a air stone, but it is constant air bubbles (2-3 streams of bubbles). How much oxygen transfer would I get from the air bubbles as far as adding fish beyond the X gallons per inch of fish formula? Sorry got a little long and turned into a rant. Thanks in advance.