Hi! I follow the method of balancing the pool here and my water is always great! Last year I started to get sand in the pool so I replaced the laterals on my sand filter (Hayward T-244) even though they weren't broken when we took out the old sand. We also put in new sand purchased from our local pool store that installed our pool 5 years ago. I was still getting some sand in the bottom. Then we replaced the entire multiport value so we could have a new spider gasket. Still no joy. In case anyone is wondering, it is sand and not algae. Here is a picture of the sand that just accumulated on the buddy seat - this is right under the jet for the seat. Sand is also on the bottom of the pool - not a ton but enough to settle in the seams of the liner. After we replaced the sand and multiport valve we got a new pump which was the same size as our first one (1.5 hp for a 33,000 gallon vinyl pool) Can anyone help? 
