I just want to echo Papa6's comments about the AutoPilot. I installed mine over 4 months ago (did the installation myself) and have been AMAZED at how beautiful the water has been with almost no maintenance. I've added about 4 gallon of bleach and probably 4 or 5 cups of acid - THAT's ALL. It works so well that I must confess that I sometimes forget about it. I have no reservations with recommending the AutoPilot to anyone... it's well worth the initial cost!