Muratic Acid from paint dept

[kschmidt1]

Need to lower pH a bit and found Muratic Acid at WMart by Kleen Strip Green. Couldn't find percentage on label for Poolmath so called mfg. Told me 20-1/2% with Baume' of 13. Numbers not offered in Poolmath drop down to figure quantity to add. Anyone help?

Thanks.

 

[Texas Splash]

Some of those brands have varied percentages. If you buy that brand, you might have to use the low end on the calculator and just keep re-dosing/testing. If you find yourself near a Home Depot or Lowes you could look for one of these:
Muriatic Acid (Home Depot):

Muriatic Acid (Lowes):

 

[smackdab]

For 20.5% MA, use 15.7% in pool math and multiply what it tells you by 0.766.

15.7 / 20.5 = 0.766

 

[kschmidt1]

Thank you for the help.

 

[atttech-2]

I have noticed at my local HD the stuff in the paint dept cost about 50% more per gallon than the stuff for pools in the garden dept. Same strength just different manufacture.

 

[JVTrain]

I have noticed at my local HD the stuff in the paint dept cost about 50% more per gallon than the stuff for pools in the garden dept. Same strength just different manufacture.

That's kind of backwards. Usually anything with "pool" on it or located in the pool section costs 50% more!

 

[Kiss4aFrog]

That's kind of backwards. Usually anything with "pool" on it or located in the pool section costs 50% more!

Isn't that the truth !!

 

[Marlahoutex]

At Lowes, the Kem-Tek 2 1-gallon pack is $13.48. It is the 20 Baume 31.45% and is in the Garden Center with all the other pool chems.

 

[kschmidt1]

The stuff from WM paint is a gallon (supposed to have 90% less voc than regular MA) for $6.88. It was handy.

 

[Johnnyeyez]

Home Depot has the same brand and the same 2-1 gallon pack for $10.98.


21,000 gal AG w/vinyl liner
30 foot round
1.5 HP duel speed pump
Cartridge Filter
Jandy Heater

 

[jmastron]

The stuff from WM paint is a gallon (supposed to have 90% less voc than regular MA) for $6.88. It was handy.

I think the "90% less VOC" claim just comes from it being lower strength (20% vs 31.45%), thus you will need more for a given pH change. For paint stripping that's probably a good tradeoff; for the pool it may or may not be depending on how you manage it.

My local Home Depots usually have 2 varieties of 2x1gal Kemtek or HDX (more recently) in the garden center, often in the same stack so you have to check the label -- 31.45% for $11.98 or 14.5% for $10.98. Obviously the higher strength is a far better value and is what I buy, but some may choose the lower because it does fume less (see the Decanting Acid thread and others for discussion on methods).

 

[kschmidt1]

I'll let you know. smackdab gave a calculation to figure using different strength in Poolmath. We'll see how that worked out. Nothing to lose. Still too high, add more. Too low, add borax. I did purchase 1/2 gal at local ACE while back of full strength for $3.99. Again, easy access.

 

[atttech-2]

That's kind of backwards. Usually anything with "pool" on it or located in the pool section costs 50% more!

It's reverse Pool Store psychology, clearly the stuff in the paint isle has the super secret special ingredients to clean concrete that mere pool acid can't. :blah:

 

[kschmidt1]

smackdab your calculation was correct. Thanks.