Stains appeared just today??

[EmilyOTR]

any idea why this could be happening now? it's the 3rd year owning this pool (which is much older than that) and stuff falls in this part of the pool a lot in May and Sept/Oct. it's getting lighter now in June and will stop soon but it's so strange that it's never happened before.

 

[duraleigh]

Don't have a clue.....what kind of tree is it?

 

[EmilyOTR]

it's an oak tree.

so, this morning, no stains! great, however, I don't know how to use chlorine! So I dumped in approx 100 oz of bleach yesterday per pool math to get to 10. I'm at 10 this morning. Do I need to add anything now? or just keep my SWG going to hold it at 10?

 

[EmilyOTR]

Also, with my chlorine at 10, is my pH test accurate?

 

[duraleigh]

If you cannot brush it away easily, a stainless steel brush will probably remove it and then a normal level of chlorine will clean up anything you missed. You could increase your chlorine level temporarily if you wish but I don't see the need.

Repeating, I would leave your chlorine alone. Keep it at maintenance levels and the stains will likely disappear.

pH is close enough with 10 FC......it's a gradual thing and starts to get erroneous around 10 ppm FC and getting worse and worse as FC ppm increases.

Again, you are fine at 10 ppm.

 

[EmilyOTR]

Repeating, I would leave your chlorine alone. Keep it at maintenance levels and the stains will likely disappear.

pH is close enough with 10 FC......it's a gradual thing and starts to get erroneous around 10 ppm FC and getting worse and worse as FC ppm increases.

Again, you are fine at 10 ppm.

right but i wasn't fine at 6, which is my target FC level for my CYA.

 

[duraleigh]

So what are you suggesting.....holding FC at 10 ppm?

 

[Texas Splash]

A day or so ago, instead of repeatedly playing hockey down under with a puck against those organic stains, I recommended increasing the FC level for a few days slightly above the target range to see if it would help resolve the staining issue. It seems to be helping. Once the stains are gone and/or those oak dropping cease, then I think the OP should be able to let the FC fall back to the normal target range. The FC of 10 was only a temp-measure for the staining.

 

[EmilyOTR]

well that's the next question, how long should I leave it at 10? My mom probably won't be testing while I'm gone and I leave Saturday for 5 days. I'll make sure pH is lowered before I leave but the FC won't stay at 10 likely so we will see when I get home, if there are stains.