Cyanuric Acid

[Watermom]

If the pump is too powerful, it can force stuff right through the filter and into the pool. Over time, it will also damage the filter.

[Sue225]

Bingo! This has been the problem all along. Why dead algae would not filter out, dull water, and pressure never going up on filter. Pressure has been at 18 all summer, never up-never down. No dirty water when backwashing, either!
Thank you so much for all your help! I wonder how many other people leave out vital information when they present a problem to you? When I read the word "channeling" and read about recirculating water w/o proper filtering (someone's thread on pool forum) something went off in my head. This forum is the best resource for pool owners ever!!
My problem started off with algae and dull water color afterwards. Now I get it!
I feel like I am rambling so, ttyl!!