Algaecide

[MartyW]

How much algaecide should I add to 18,000 galon IG vinyl for winter? I live in Harford County, Maryland.

Thanks, Marty

[duraleigh]

The dosage will be on the label.

[MartyW]

Thanks Dave,

I didn,t know if more would be better or if it would have any negative effects on the rest of the water chemistry.

Marty

[duraleigh]

Gotcha' now. I personally don't use it but those that do seem to indicate it's fine to overdose a little. Others better informed will give you a more accurate opinion.

[ivyleager]

Just make sure you are using polyquat algaecide.

CaryB

[Watermom]

I usually add a double dose when closing per Ben's instructions.

[ShelleyAnn]

Where are Ben's instructions?

[Watermom]

They are not here. They were in some of the old threads that were lost when the forum crashed. He had recommended that a double dose of Polyquat 60% be added upon closing.

[NWMNMom]

I think the standard for the Polyquat 60s was 9oz (initial treatments) -16oz (visible algae) per 10k of water - I put in 32oz today to prep for closing (the size of one bottle)