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Alternatives to PH Up/Down ?

7.62

AKA - HOG & Proud to be a DEPLORABLE!
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I am waiting on my order that has my ph up/down in it and the company is slow in sending my order. What can I use to adjust my PH either up or down until it arrives?
 
Vinegar and lemon, though they are weak and lose buffering potential really quick. What works wonders (and does no harm) is sulphuric acid, obviously very diluted. Battery acid is usually 30% strength, and you can just use a drop to do the trick nicely. In fact, sulphuric acid is used as a long term buffer on many horticulture products to extend shelf-life

Never had to pH up, but if I had to, I'd just use Rhizotonic, it's very strong struff
_
 
I'm growing in soil. FF Happy Frog.
 
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