More Notes

updated formula notepad regarding pH adjustment after alkalinity increasing

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@@ -0,0 +1,66 @@
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formulas.md

@@ -15,6 +15,27 @@ Target CYG (saltwater) = Current FC / 0.05
 ## Alkalinity Raising
 Pounds of Sodium Bicarbonate (BP100) = [Desired TA Increase (ppm) * 1.4] / (Pool Gallons / 10,000)
 
+## Lowering pH (or readjusting pH after raising alkalinity)
+3 options: Muriatic Acid, Acid Blue, Sodium Bisulfate/Lo N Slo
+
+### 31.45% Muriatic Acid
+Fluid Ounces of Muriatic = [10 fl oz * (Desired pH Drop / 0.2)] / (10,000 / pool gallons)
+
+### Acid Blue
+Fluid Ounces of Acid Blue = [10 fl oz * (Desired pH Drop / 0.2)] / (10,000 / pool gallons)
+
+### Dry Acid or Lo N Slo
+Ounces (by Weight) of Dry Acid = [13 oz * (Desired pH Drop / 0.2)] / (10,000 / pool gallons)
+
+## Increase pH
+Ounces (by weight) of Soda Ash (Balace Pak 200) = [6oz * (Desired pH Rise / 0.2)] / (10,000 / pool gallons)
+
+## Adjusting pH Down after raising Alkalinity
+Gemini says this should be done with a Matrix or Dynamic Algorithm, and the Algorithm sounds like the best option. However, instead of a "dynamic algorithm" like Gemini probably intended, I think several formulas might work fine.
+Simply put, we first check the input Total Alkalinity (as provided by ALEX), and see whether it's above, below, or inside the target range. If the input is below, we would run the formula to determine how much Alk. Increaser is needed to reach the target range, preferably as close to the middle as possible, and "log" that number, which is our new TA.
+Next, we need to figure out how to adjust for pH. We start with a simple formula:
+Base Dose (fl oz) = [Pool Gallons / 10,000] * ([Current pH - Target pH]/ 0.2) * 10
+
 ## TA Lowering