Hi, Jaybee,

If you are seeing visible matter "blowing thru the filter" (i.e. back into the pool thru the return jets) you have a filtration issue.

No filter, sand, de or cartridge, should allow anything visible to reenter the pool. Like Marie said, you have to keep your Cl level up (looks like you're still consuming just a tiny bit) but I think, if I read your statement about visible matter correctly, that your filter is the primary culprit.

It was a good idea to brush up the stuff......but if your filter's at fault, it's a moot point.