I drive up 16th street a lot because it's on my route home. Often, I stop for groceries at Potrero center. When I do, I swing by petco because I like to stare at fish. The Potrero center petco has always had reasonably healthy saltwater fish. For a long time, it was run by the wife of one of the ocean treasures employees. It's always been a clean store, but only for fish. It's now stocking coral, snails, a few inverts, and they look reasonably healthy to me. My only complaint is lower lighting than I'd like to see. If you ask for the current manager, Rachel, you will find that she is very knowledgeable and cares a lot about the store. Considering our current lack of SF stores, I'm going to start buying here occasionally. In fact, I've already purchased a yellow striped Cardinal last week. It's doing great. I know it's a petco, but I thought I'd point it out to you guys.