Slamming and Algae: CYA before ammonium sulfate?

[TomLane]

Hello

We recently replaced our pool pump and then our backwash valve. Basically our pool turned dark green while waiting for a part. Currently the pool is light green and their is no cya.

Also, we have 6 pounds of green to clean(ammonium sulfate) and 18 pounds of calcium hydrochloride. The pool store guy is recommending we add the green to clean (ammonium sulfate) then shock every six hours with 6 pounds of the calcium hydrochloride. And them address the cya issue. Not so sure about the cya part. We have plenty of cya on hand and I would think I would treat this issue first? We normally use liquid chlorine but are using shock packs for convenience.

Most everything I am reading on the forums addresses using ammonium sulfate with a high cya only and most do to recommend it. Also, I am also wondering if I just raise the cya and then slam?
Thanks, Tom
.
Pool values today were
FC = 0
TC - 0
Salt 3400
Calcium hardness = 230
TA = 100
PH = 7.8
temp = 72

 

[mknauss]

Do NOT use the ammonium sulfate. It will add ammonia to your water and you will have a fight on your hands using loads of chlorine to defeat the ammonia.

Follow the SLAM Process process. I would not suggest using the Cal Hypo either, but that is up to you and what you are comfortable with increasing your CH.

You should add CYA to 30 ppm, lower your pH to 7.2, and SLAM.

 

[TomLane]

Thanks, I didn't even think about the calcium increasing. Time to add the cya

 

[TomLane]

Nevermind, Found the pool calculator.

 

[Texas Splash]

Gotcha! Tom! Don't forget to update your signature with all of your pool and equipment info. Include which test kit you have as well. Good luck!

 

[splashpad]

... we have 6 pounds of green to clean(ammonium sulfate) and 18 pounds of calcium hydrochloride. The pool store guy ...

If you can get these exchanged for liquid chlorine, it would be money MUCH better spent
Here is a recommended plan SLAM Process