So, this is my first post here, although I’ve been using this site as one of my primary sources of information for the year I’ve had my pool. Sorry for its excessive length!
My water supply has a very high TA, nearly 180, which I understand is because water is in Cambridgeshire is mostly sourced from bore-holes due to its flat landscape and fairly low rainfall
Until now, I’ve always had issues with a *high* TA. I nearly added a fountain that I could switch circulation to in order to aid out-gassing, before I realised that I could angle the jet upwards
However, I last measure the TA to be at 30. pH is very stable - I set it to 7.00 and it holds between about 6.94 and 7.04 almost 100% of the time. ORP very stable too at an alleged 750mV, only varying by a few points ... with a typical free of 0.5 and combined of nearly zero - you can see a slight colour change - I’d guesstimate 0.1. CYA at 0, no UV, silver or other chemicals in play
Given everything else is stable, do I need to worry? I’ve bought a few Kg of bicarb which I can tip in if needed.
I suspect a slightly higher pH would reduce acid demand and therefore reduce the rate I lose TA? There’s not much objective reason for keeping it at 7, other than the water feels “nicer” on my skin and in theory it should allow the same disinfection with slightly less chlorine
I know that with plaster pools, low calcium hardness (which I think is one of the three things that add up to total your TA?) can case dissolving, but is there any issue for me?
My water supply has a very high TA, nearly 180, which I understand is because water is in Cambridgeshire is mostly sourced from bore-holes due to its flat landscape and fairly low rainfall
Until now, I’ve always had issues with a *high* TA. I nearly added a fountain that I could switch circulation to in order to aid out-gassing, before I realised that I could angle the jet upwards
However, I last measure the TA to be at 30. pH is very stable - I set it to 7.00 and it holds between about 6.94 and 7.04 almost 100% of the time. ORP very stable too at an alleged 750mV, only varying by a few points ... with a typical free of 0.5 and combined of nearly zero - you can see a slight colour change - I’d guesstimate 0.1. CYA at 0, no UV, silver or other chemicals in play
Given everything else is stable, do I need to worry? I’ve bought a few Kg of bicarb which I can tip in if needed.
I suspect a slightly higher pH would reduce acid demand and therefore reduce the rate I lose TA? There’s not much objective reason for keeping it at 7, other than the water feels “nicer” on my skin and in theory it should allow the same disinfection with slightly less chlorine
I know that with plaster pools, low calcium hardness (which I think is one of the three things that add up to total your TA?) can case dissolving, but is there any issue for me?