Is it a fool's errand to try to lower/maintain a TA of 70 when the fill water is 140?
My "ideal" chemistry requires a low TA. I tend to have high pH, so I wanted to slow the pH rise cycle with borates. I wanted to get the TA to a target number before adding the borates. The target chemistry looked like this:
pH: 7.8
TA: 70
CH: 400
CYA: 80
Temp: 86
Salt: 3000
Bor: 40
CSI: -0.11
With those values, it would allow for water temp 70F+ without any issue, and for winter months I would keep the pH around 8.2 to offset the CSI drop from the lower water temp.
The TA is going to creep upward with evap/fill water, should I rely on my small, periodic MA additions to counter that and hope it holds steady?
I posted a thread earlier where I was trying to lower my TA by cycling my pH down to 7.0 to tick the TA down (I'm down to approximately 80-90 from 140 after 4 cycles). This was apparently causing my CSI to go too negative and now my CH is notching up, possibly due to leeching some calcium from the plaster. So I won't be doing that process anymore, I'll be going for more gradual reductions with pH reductions to around 7.4 and it will just take longer to bring the TA down to target.
But I'm wondering what the long game is here... thoughts?
My "ideal" chemistry requires a low TA. I tend to have high pH, so I wanted to slow the pH rise cycle with borates. I wanted to get the TA to a target number before adding the borates. The target chemistry looked like this:
pH: 7.8
TA: 70
CH: 400
CYA: 80
Temp: 86
Salt: 3000
Bor: 40
CSI: -0.11
With those values, it would allow for water temp 70F+ without any issue, and for winter months I would keep the pH around 8.2 to offset the CSI drop from the lower water temp.
The TA is going to creep upward with evap/fill water, should I rely on my small, periodic MA additions to counter that and hope it holds steady?
I posted a thread earlier where I was trying to lower my TA by cycling my pH down to 7.0 to tick the TA down (I'm down to approximately 80-90 from 140 after 4 cycles). This was apparently causing my CSI to go too negative and now my CH is notching up, possibly due to leeching some calcium from the plaster. So I won't be doing that process anymore, I'll be going for more gradual reductions with pH reductions to around 7.4 and it will just take longer to bring the TA down to target.
But I'm wondering what the long game is here... thoughts?