spring startup

[jarsch]

Thanks for all the help my PH is 7.6 my Ta is 60 ppm how can I raise the TA without raising the PH? Thanks Jerry

[aylad]

You can raise the TA by using plain Arm & Hammer baking soda, but if you're going to use unstabilized chlorine from here out, the TA is just fine at 60 ppm.

Janet

[PoolDoc]

Janet's right, of course.

But, why do you want to raise your TA? It's a fiberglass pool. With your CYA that high, you are going to have to run VERY high levels of chlorine to avoid algae. Using bleach won't lower your CYA; it will just keep it from going higher.

You'd be better off adding borates (and acid) to get additional pH stabilization in the water. LOW carbonate alkalinity -- the part of TA that baking soda raises -- inhibits algae. High borates ALSO inhibit algae. On your pool, 6 boxes of borax, plus 2 gallons of muriatic acid should get you there.

Read this thread: http://www.poolforum.com/pf2/showthread.php?13111 about using muriatic safely.

[jarsch]

When testing water with regents does temp ( 50 F ) affect readings Thanks Jerry

[PoolDoc]

I don't think so, but it will slow reaction times, so you may want double or triple the time you wait before reading, especially on the chlorine and CYA tests.

[jarsch]

how much bleach is needed to shock pool 6500 gal fiberglass pool thanks Jerry

[Watermom]

In your pool, each quart of 6% bleach will add about 2.3ppm of chlorine. Shock level needed is based on your CYA level. See more about this in the Best Guess Chlorine Chart in my signature below.