Good for you and thank you. That is the way to learn, but are you sure he is/was a friend at $300 a day
Not all teachers are *good* teachers I can tell you the secret to keeping a pool clear is removing phosphates. Use PhosFree, PoolPerfect or any commercial available phosphate remover and your chemical usage will decline. No phosphates = NO ALGAE = clear water. I stop putting chemicals in my pool in about October and just use a remover through the winter and start up in the spring with clear water
There are lots of hotshot "drain" cleaning services that do just that. Even though I have an electric drain cleaner, a closet snake and assorted drain clearin stuff, when my kitchen drain backs up and its cold, rainin and down right s***ty outside, I'm calling them!!!