Muriatic Acid Question

[mycalpool]

Hi Chem Geek

I was looking for a formula for muriatic dosage. Assuming Alkalinity, Hardness, CYA and Chlorine in normal ranges.

If you posted a thread with this info I would appreciate pointing me to it.

I was looking for something that would take
pool size in gallons
% concentration of muriatic acid
and lowering PH 0.2 ppm

[waterbear]

Hi Chem Geek

I was looking for a formula for muriatic dosage. Assuming Alkalinity, Hardness, CYA and Chlorine in normal ranges.

If you posted a thread with this info I would appreciate pointing me to it.

I was looking for something that would take
pool size in gallons
% concentration of muriatic acid
and lowering PH 0.2 ppm

TA also needs to be taken into account. That is why the only way to know how much acid will effect a particular pool is with an acid demand test. Otherwise you can use a ballpark figure of 1 pt /10k gallons as starting place, assuming TA is within normal range. IF TA is high then more might be required and vice versa.

[chem geek]

Hi Chem Geek

I was looking for a formula for muriatic dosage. Assuming Alkalinity, Hardness, CYA and Chlorine in normal ranges.

If you posted a thread with this info I would appreciate pointing me to it.

I was looking for something that would take
pool size in gallons
% concentration of muriatic acid
and lowering PH 0.2 ppm

You can use The Pool Calculator for some approximate computations including the effect of TA, but it's only approximate. My spreadsheet here will do the precise calculations, but it's not designed for novice users. You can PM me if you decide to use it and I can walk you through some sample calculations.

I intended to finish a simpler spreadsheet (that I've already started) that Jason could use for The Pool Calculator calculations and I took some stuff to Yosemite with me, but ended up hiking Half Dome instead. Some day I'll get around to it.

Richard

[poolaris]

Thanks for all the info. You have answered a question thats been bugging me for a while. I had been buying acid at Home Depot for about $8 and been using about 1 gallon a week. I recently bought some at a pool store for slightly less and my usage dropped to 1 gall every 2 weeks. I found an old Home Depot carton and sure enough the acid was half the strength - Wow! HD acid was also a yellow color whereas the new one is clear.