I have been shopping there for 3 years, recently a new change in employees has improved the quality of the systems and seemingly less disease. DO NOT ASK THEM ABOUT FISH MEDICINE, they are dumb and do not give good advice at all, they do not know anything about obscure and or very nasty diseases, and will recommend the most expensive medicines.
Their fish often look underfed, be very wary of their systems, ask them what tanks are on what systems.
They seem to have a lot of cichlids (over priced), lots of larger african/amazonian fish ( they don't know **** about catfish depending on who is working), they don't take very good care of their saltwater fish generally speaking. If I were to rate them between 1 through 5, 5 being the best, I'd give them a 3. As well as the owner I guess he knows nothing really about the fish (freshwater), so don't ask him anything other than basics.
Exotic Aquatics is a little better, there is a guy there named Shawn he is really nice and has lots of experience, as well as another guy with short Black hair and a short mustache and beard who is AWESOME, however they seem to overstock their tanks and cannot control those that parish very well, however Exotic Aquatics will take the time to talk to you MUCH more so then Aqua Imports.
Aqua Imports has great deals on used equipment and tanks, they do sometimes have more rare fish like the Peacock Gudgeon.
But Exotic Aquatics has better deals on plants and Amazonian Fish, and sometimes has those hard to come by "I must buy this now because its beautiful fish".
If you are willing to take a trip Denizens of the Deep in Ft. Collins has beautiful stock and the employees are superb, plants are VERY expensive though but are in great quality and hey they are EVEN LABELED CORRECTLY! HA! Imagine that.
Shoot me a PM if you need anymore help, I wouldn't mind shopping with you too, I live right in Boulder.
Ciao
bella