Yea, I was thinking platys.. lol.. swordtails do get up to 5" as luniyn says. Any chance you'd be able to get a 20 gallon to put the swordtails and a few cory cats in once it's cycled? Then you'd be able to add a few corys to the mollies in the 10g.Luniyn said:Actually you are overstocked (well you will be as they grow) with just the 2 swordtails as they get to be 5" each as adults. The mollies get to be a bit over 2", so you are looking at 14"+ when they all reach adult size. OK to leave them all in there, just understand it will require more maintenance to deal with the extra load eventually.