After getting advice from the forum, I was able to get partial credit for my Aquaeon 30 power filter and switched to the AC50. The water has never been clearer. Still working on the fish-in cycle. Ordered an active filter from angelsplus and it will arrive tomorrow. Hoping to get the same results as phishfriend with it. The AC50 came with 2 extension tubes. Ideally how deep should the extension tube be in the tank? Will keep every updated on the active filter. Thanks to everyone for the help.