Dont trust what LFS say unless you know they are reputable. Stores like Petco and petsmart tend to feed alot of crap when selling fish. I just got back from there and told this group that they didnt need aquarium salt and that in many cases can cause more harm then good depending on what species are kept. After I told them that when they left the area the employee told them I was lying so that annoyed me a lot. Anyways always do your research on any species you buy and rely on yourself more then the store. I keep molly and have had them breed even. I started with a single Molly in a 5 gallon and then moved to a 10 gallon and then a 30 to get my current stock in my sig.