Hi, I am brand new to TFP and never heard of it before and wish I knew this long ago. I have a 40 X 20 (33000 Gallons) In ground pool with Sand filter. I am interested in learning from experts like you on 1. how to defeat the algae 2. Where to get most of the chemicals and water testing kits that is mentioned in this forum. Thanks and looking forward to enjoy being an owner of swimming pool rather than feeling why do I have a large pool.