My favorite is Aquatic warehouse. Any time were up there, which is often, we stop by at the warehouse, Octopusses garden, and sometimes Pet kingdom. Unfortunately the later two don't keep a heavy stock, but have good prices. We also go to Scipps in LAJOLLA for all of our water, can't beat the price(free). How about yourself? What area you in? We have family in Lamesa, and Chullavista.
Bill