I had about two dozen swordtail fry in a ten gallon tank and now can only find four. Is it common for this to happen with a fry tank? I have been feeding them three times a day. I also plan to buy another ten gallon tank so i will have three and then split the ones that i have in my ten gal. community. I have two platy, two swordtail, two guppy, and two molly. What should I put together? I also have a newt and an albino corydora.