PLEASE SEND ALL QUESTIONS, "MY TANK IS COVERED IN ALGAE, WHAT DO I DO", and "WHAT KIND OF ALGAE IS THIS", "WHAT IS THIS GREEN-PURLPE STUFF", "DO I NEED PHOSPHATE REMOVERS' and of course, "HOW DO YOU PUT THIS DARN REACTOR TOGETHER" directly to Tom Barr! Ask him about his algae balls while you are at it... :) Robert Paul Hudson http://www.aquabotanic.com