Back From vacation

[poolmom06]

If I have that much bleach in it, why is my water still green?? Today I have vacuumed to water(twice), drained and refilled about 6 inches and back washed.... shouldn't my water at least lighten a little bit??
My readings are exactly the same as they were this morning... well Ph has gone down a bit...

[CarlD]

That's a REALLY good question:

If your pool is still green then there is no way your FC is 47. Sorry MBar, but you don't figure FC from what you add, but rather from what you measure.

When you are fighting a serious algae bloom you'll use lots and lots of chlorine.

Your pH reading cannot be taken accurately unless your chlorine level is down. If you are using Taylor R-0004 or R-0014 to test your pH, it will be more accurate because it neutralizes chlorine up to about (I think) 15ppm.

If you have chlorine neutralizer drops (Theosulfate, Taylor R-0007) you can add 2 drops to the pool water in your test cell before adding the pH chem.

You COULD bleach your liner if your FC is sustained higher than 15 for a while, but if you reach 15 to 20 in an algae-infested pool it probably won't stay there long enough to damage or even fade your liner.

Still, you need to be able to measure your chlorine at the higher levels, especially now. You need a FAS-DPD chlorine test kit. You can get it in the PoolSolutions.com kit Ben sells--the PS-234, or the Taylor 2006, or Leslie's FAS-DPD Chlorine Service Test Kit, but only on-line.

All three will sell you, I believe, just the FAS-DPD kit.

[poolmom06]

My water is looking more blue today... I am about to go test it, I will report back.... I can't believe the difference over night!! It's looking better! My son wants to have some friends over to swim this weekend, hopefully he can do that!!

[mbar]

Yes, I didn't take into account how fast the chlorine would be used up with the algae! I was just thinking about the amount that went in at once. I am so glad your pool is looking fine - bleach really does work every time!