Quote Originally Posted by matthewnadeau View Post
I've been keeping our chlorine level up over 5ppm and shocking the pool about every two weeks, but the algae keeps coming back. We brush the side of the pool, super-chlorinate, etc. but nothing has worked so far.
You are using tablets, so your CYA is probably out of sight. This requires much higher chlorine levels, which you can see at the top of the Chlorine forum. Running at 5ppm won't do anything to get rid of the algae, nor will shocking every two weeks. You have to shock the pool, probably raising the chlorine to at least 20ppm, and keep it there for several days. This will require testing the water several times a day, and adding more chlorine almost every time you test.

Get some good test results, particularly for CYA to get specific advice.