Hello from Orange County NY (About 60 miles North of NYC) I am the proud owner of a brand new 21 foot round pool with a Hayward EC50 DE Filter. I have absolutely no pool experience and did this for my 3 beautiful kids. I joined this forum because as I look at this big monster newly erected in my backyard I get this pit in my stomach and listening to all my so called expert friends, none of which have a pool is making me crazy. I hope to learn here and eventually join my kids in their enthusiasm for our new pool.