Quote Originally Posted by wetshoes1 View Post
I bought a bottle of poly...(oxy.., dimethy...)(I hope this is the right thing)
I want to add it before closing up. I read on another thread not to run it through the filter.
My problem is I don't have a recirculating option. What should I do?
My impression is the group's divided on this. I cannot find justification for the concern. It's a liquid and even a DE filter will not filter out a liquid. I add a quart twice a season and two to close my 22K gal. IG. For closing I'll add it, then run the pump for 24 hours to mix. I also don't have a recirc. option.

But others here with more experience than I, feel it is filtered out and therefore shouldn't be added to the skimmer, nor backwashing done immediately after.

C.