POLL with pictures - Yellow mustard or green

[ned8377]

Really need a definitive answer here to determine how high to go with SLAM. Also, does CYA protect a vinyl liner from the harsh affects of chlorine?

Can't see the drain at deep end.

Deep end.

Deposits this morning after brushing last night around 6 pm.

Entire surface has a layer since 6 pm last night that can be brushed into a cloud.

 

[JamesW]

I would say that it is mustard algae. And, yes, cyanuric acid does protect the liner.

 

[duraleigh]

I believe what you see on the floor is regular (but dead) algae.

Regardless, SLAM as if it were mustard algae.....all it takes is a little extra chlorine and you're all set.

Naturally, the advice we give begins and ends with test results. You should post yours.

 

[northrn]

Ned, it's much easier for advice givers to follow your complete story if you keep all your posts together in one thread.

Yesterday you posted that you had a CYA of 40.

http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock

That link will take you to the Chlorine/CYA chart and give you the levels for minimum, target maintenance, and SLAM levels.

Also, Pool School has a wealth of information for you. The link is at the top of each page on this site. Welcome to TFP!