What would you like to do?

If pH is 7.8 and total alkalinity is 240 and the 12'x3' pool is starting to get green stuff in the bottom what should you do?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

Add muriatic acid to lower your TA to a more acceptable level...around 100, but no higher than 140. Then balance with bicarbonate of soda if necessary to increase ph. Once you get to an acceptable TA add an algaecide or shock the pool to get rid of the algae on the bottom.  
Just triple shock with liquid chlorine; for your pool 2.25L. You probably need to add water (because of splashing) quite regularily so I wouldn't bother lowering the alkalinity.
Thanks for the feedback!

Why would clear pool water turn green after adjusting the pH and alkaline and shocking it according to the pool store's directions?

Answer   You need to put an alagecide in your water.   If there is metal in the water, the metal will react with the chlorine shock and turn green or brown. Certain ar

Do you adjust the PH first or the alkalinity first in a swimming pool?

Alkalinity first!   First check to see where the total alkalinity is in PPM, then determine how many PPM change is needed to reach your target reading. Caution, I alway aim

Is pH 12 non alkaline?

  pH 12 is very Alkaline. So the answer is no.

What to do if PH is 8.4 and alkainity is 240 in your pool?

The chemical to use to lower your PH and Alkaline Levels would be Sodium Bisulfate or PH Down. While the pool is running broadcast 1lb per 10,000 gals of water and apply this

How do you lower alkalinity but not change pH in a swimming pool?

Initially, you can't. What you do to lower alkalinity is first lower the pH to under 7.2, but not lower than 6.9. Then you aerate the pool, by creating bubbles with your brush

How do you clear up green pool water when the pH and alkalinity are in balance?

Answer   Alage, Alage, Alage, you need to control it, and once you do your pool will be sparkling clean   Response to this ridiculously useless answer: First of all, i

What is the green stuff in your pool water?

Green Stuff in the Pool The green stuff is one of two things: 1) algae which needs to be oxidized (shocked) or 2) copper which can be removed with a sequestering agent. He

How do you raise the pH in a swimming pool without affecting the total alkalinity?

Alkalinity and pH   In a pool with an alkaline pH level (7.0 to 14) you would use soda ash. If your pH level is acidic (6.0 to 6.9) when you add soda ash (sodium carbonat