It totally depends on which store. I bought an Oscar from there and kept it for 2 years till I sold him. I bought my 6 glow-light tetras there 6 months ago and they are fine. The reason I avoid them now is they use one water supply for all fish which I'm not fond of. I believe it spreads disease. Of course they treat the water so they are fairly safe, but now I work at a LFS so no need to go there. The LFS I work at and another next to my house have individual tanks setup.