I have a 75 gallon tank and just put 2- koralia 1550 pumps on a koralia wavemaker. I placed them in my tank the best I could figure from everything I have read on the site about powerhead placement. By the way this site is pretty cool, I have gotten answers to a lot of questions I didn't know I had until reading through different post, so thanks for all the info you guys provide. If y'all could please look at the picture I posted and let me know your opinion of the powerhead placement I would greatly appreciate it.

