Hayward s220t filter issues?

cnshough

In The Industry
Jul 3, 2013
88
FC 18
CC .5
CYA 40
pH 7.6
Alk 130


The manual says this filter should be filled with sand to about 6" from the top. I'm in the process of Slamming, and there doesn't seem to be any difference in clarity since saturday. I'm deep cleaning my sand right now, and its only filled to about
12" from the top, possibly more. Could this be causing the slow/no clearing?