My pool has automated acid feed (Hayward CAT controller w/Stenner acid pump). Pool requires regular acid additions to maintain pH (I keep pH at 7.6).
I have the Stenner set to give low rate doses (set at 1.5, 10 is max dose per "pulse"). The acid is injected into only return line (4 inch, pump is roughly 375gpm). Return line is linked to multiple pool inlets spaced evenly throughout perimeter of pool (3/8" holes in stainless guttering, 100 total as a wild guess).
Eventually my alkalinity gets low and I have to add sodium bicarb (when alk gets to 40 I raise to 70 or 80 max). Sodium Bicarb is broadcast into deep end (12ft). Supply to pump is through 5" or 6" line (can't remember which) from 2 main deep end drains and perimeter gutter overflow. Supply lines gravity flow to surge pit, pump pumps from surge pit.
Question is, should I turn off my acid feed when I need to add Sodium Bicarb? Or can I just let it run because the rate is so low, pump flow is high, and inlets are evenly spaced?
I was instructed to always turn off the acid feed until sodium bicarb is fully mixed (6 hour pool turnover). When I do that though, pH usually rises and then Stenner has to play "catch up" to correct pH.
I guess question could also be relevant to chlorine additions (applied to deep end).
So what say you? Turn off acid until additions are fully mixed? Or leave on because acid doses are small and highly diluted?
Thanks in advance.
I have the Stenner set to give low rate doses (set at 1.5, 10 is max dose per "pulse"). The acid is injected into only return line (4 inch, pump is roughly 375gpm). Return line is linked to multiple pool inlets spaced evenly throughout perimeter of pool (3/8" holes in stainless guttering, 100 total as a wild guess).
Eventually my alkalinity gets low and I have to add sodium bicarb (when alk gets to 40 I raise to 70 or 80 max). Sodium Bicarb is broadcast into deep end (12ft). Supply to pump is through 5" or 6" line (can't remember which) from 2 main deep end drains and perimeter gutter overflow. Supply lines gravity flow to surge pit, pump pumps from surge pit.
Question is, should I turn off my acid feed when I need to add Sodium Bicarb? Or can I just let it run because the rate is so low, pump flow is high, and inlets are evenly spaced?
I was instructed to always turn off the acid feed until sodium bicarb is fully mixed (6 hour pool turnover). When I do that though, pH usually rises and then Stenner has to play "catch up" to correct pH.
I guess question could also be relevant to chlorine additions (applied to deep end).
So what say you? Turn off acid until additions are fully mixed? Or leave on because acid doses are small and highly diluted?
Thanks in advance.