Is muratic acid safe to lower ph?

Zorak

Member
Just curious if there is any problem with using dilluted hydrochloric/muratic acid to lower the PH? I have been doing this for a couple months in my DWC and my girls look great.
 

Someguy15

Well-Known Member
Just curious if there is any problem with using dilluted hydrochloric/muratic acid to lower the PH? I have been doing this for a couple months in my DWC and my girls look great.
If you like releasing CL- ions in your solution. If your only using this in small quantities it might be fine, but hydroponic ph lowers contain phosphoric acid, citric acid, mono ammonium phospate ect, NOT HCL. There is a reason for this.
 

SmokeyMcChokey

Well-Known Member
What form of citric acid? I used lemon juice when I ran out of ph down once and it fermented in my res:dunce:.

Thanks for the advice guys
lol i bet it did. You can purchase powdered citric acid from some specialty restaraunt stores but phosphoric acids are easier to come by. Lowes may even carry them. But GH ph up an down can be bought online for cheap enough
 

AriZponic

Active Member
Hi Zorak,

You can find Klean- strip phosphoric prep and etch at Home Depot, it's something like $14.95 a gallon where I live. I couldn't find it at Lowes, though they do carry the Klean strip product line.

http://www.kleanstrip.com/

Look under products - cleaning and surface prep - phosphoric prep and etch. Sorry for the run around way to get there but for some reason their link to the exact page doesn't work. Also included is the MSDS of the product which shows the strength and the purity of the product. Looks legit (just phosphoric acid and water), but I haven't tried it yet.

As for the hydrochloric acid it will work. I bought some which was advertised as PH down at a local hydro shop several years ago. I didn't have any problems with it, though I hardly ever used it. This as the GH nutes I was using kept the PH in line, the majority of the time. Plus a few drops of PH down goes a long way anyhow.
 

fatman7574

New Member
Citric acid is good for use with organic nutrients but really should not be used with chemical based nutrients. HCl will as said introdoce Chorine and that can be helpful or hurtful depending on the amount added. Used not more than every few days in small amounts it would be fine. Daily use or to make large adjustments would likely amonut to using too much chlorine. Chlorine is commonly used for root rot but at very low dosages. Phosphorc acids or nitric acid are preferred as other than the H+ all they add is a usable fertilizer salt. Nitrogen. Sulfuric acid is another choice as long as not used contiously as it will eventually mean an excess of sulfur which cause the formation of calcium sulfate (gypsum, like in wall board).

Organic acids, citric and acetic (vinegar), should really only be used with organic nutrients.

Klean-Strip is usually in the paint section with the thinners etc, however it is also used to clean/etch concrete.
 
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