I will keep the remaining Molly in there and just let things take their course. The remaining one is eating and it does appear to be nibbling algae off of my tank heater, so it is performing a slightly useful function. They were pricey for Mollies at $10 each (keeping in mind the acclimation process was already done for me), so I don't want to just get rid of it. It certainly isn't hurting anything in my tank and it does eat a bit of the left over food bits. Either way though I certainly wouldn't recommend someone to go out and get them. I only got them to try for algae removal and they really didn't do much in that department.