Well this is a new one for the group...
(I revised this subject to reflect what I now think is a real problem with DE blowing through the Sand (last post has those details)
My water is perfectly clear, except at night in the LED I see floaties...
So the decision to ADD DE to make it perfect happened.
PROBLEM IS - I have this DANG Pre-Filter that my PB insisted works...and guess what it does...it seems that ALL the DE (3 cups) ended up in the Pre-Filter and none in the sand as the pressure never moved.
Now I did this on high speed, as that is what I was told.
Anybody have any new techniques that might work ? Good news is this dang Pre-Filter ROCKS - but I guess it is not catching the floaties, just the FINE Particles which I guess is what DE is.