If you can find something called "Sour salt" at the grocery store, it's nothing more than citrus acid. Thus the same stuff used in some hydroponic pH adjusters (like the one I use). Or if you have a restaurant supply place, health food store, food specialty shop etc. they may carry citrus acid also, and even at a much better price.
P.S.
If you are adjusting your pH every day (regardless of watering cycles), something is wrong.
Last edited by GpsFrontier; 08-21-2011 at 06:13 PM.
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