- Mar 19, 2010
- 6
I have a problem with a pool situated in the Cook Islands in the South Pacific.
The water here is VERY hard and reading the information here on TFP am aiming for a TA of 100 and pH of 7.5. There is a blocker in the pool to keep the CYA levels up and the FC is over 5.
Before achieving these levels, I had algae form. Shocking it with Chlorine got rid of most of it but I still had quite alot of staining on the bottom. This required draining the pool & acid washing it off. This worked ok, but now I have the pool refilled and I am getting alot of white 'dust' on the bottom of the pool. This happened before too.
Is it likely to be the calcium falling out of the water formiing a 'layer' over the pool not allowing the chlorine to work or could it be undissolved chlorine falling to the bottom. the pool is approx 45,000 litres (approx 1200 U.S gals) and on refilling I have put in 5 litres (1.3 U.S gals) of acid and 600 mls of chlorine over a day.
At the moment TA is 130 and pH is 7.6. There is alot of this white dust which rises when the pool is sweept.
Any ideas what is happening, and what I should be doing to improve the water quality and prevent algae from coming back.
The water here is VERY hard and reading the information here on TFP am aiming for a TA of 100 and pH of 7.5. There is a blocker in the pool to keep the CYA levels up and the FC is over 5.
Before achieving these levels, I had algae form. Shocking it with Chlorine got rid of most of it but I still had quite alot of staining on the bottom. This required draining the pool & acid washing it off. This worked ok, but now I have the pool refilled and I am getting alot of white 'dust' on the bottom of the pool. This happened before too.
Is it likely to be the calcium falling out of the water formiing a 'layer' over the pool not allowing the chlorine to work or could it be undissolved chlorine falling to the bottom. the pool is approx 45,000 litres (approx 1200 U.S gals) and on refilling I have put in 5 litres (1.3 U.S gals) of acid and 600 mls of chlorine over a day.
At the moment TA is 130 and pH is 7.6. There is alot of this white dust which rises when the pool is sweept.
Any ideas what is happening, and what I should be doing to improve the water quality and prevent algae from coming back.