What is SPL exactly? I know it as Sound Pressure Level from my car audio days.

I was going to try the DE addition if it happens again, but heard horror stories of it blowing straight into the pool and being a bigger mess. Last year I was just vacuuming to waste basically while having a hose running into the pool.

I had a pool company come to my house and do the vacuuming last week.. He brought his own pump and a cartridge filter.. seemed to handle the algae on the bottom just fine. Could always find a used cart filter for that purpose. Pool guy said I should really just look for a better sand filter, a Hayward is what he recommended. But figured he was trying to sell me something.

Since nobody is replying with a "OMG you have that filter/pump.. no wonder" it at least puts my mind at ease enough not to worry about it.