Age of Aquariums
2462 Cherry Avenue
Signal Hill, 90755
is a really good one
Down here behind the Orange Curtain where I live are a bunch too.
Amazing Reefs and Aquariums in Orange is great
Seaside Tropical Fish in HB is also worth the trip and always has weekly specials
Reef Lounge in Anaheim is usually good for fish and Corals
Two Guys Corals is mind boggling for coral. Almost across the street from Reef Lounge
Reef Raft USA is about 90 seconds from 2 Guys and has some of the best corals this side of the Mississippi, but definitely call 1st to see if he is in.
Coral Gazers in Santa Ana/Tustin is a place to find designer clowns and the rarities
There's an afternoon worth of "Store Tours" for you.
Have fun!!