Best pH down around town?

the guy at the hydro store told me to use vinegar for ph down and baking soda for ph up. I ended up spending 12 bucks on the ph up and down liquid...considering the vinegar might leave a taste in my ganja and i didnt even wanna find out what baking soda tastes like when smoked so.....in any case i say just get the liquid. Like homeboy said 1 or 2 drops and your ph drops significantly.

ill use a little bit of distilled white vinegar. its cheap and only a couple drops per gallon will drop yer ph quick. ive also heard of using lemon.

If you're going for a pH drop, vinegar or plain ammonia. Ammonia will drop it hard and fast, and is primarily nitrogen, so cut back on any nitrogen-containing nutes if you use ammonia.

General hydroponics "PH Down" $6 bucks a half pint. Plenty!!

Your plant will not uptake the vinegar/baking soda or any similar compound in its molecular form.. Also, presence of too much sodium can lock out potassium, so be careful..
As for ammonia as a pH down.. That will be unpredictable across different setups..
Its a hairy equilibrium though, dependant on pH, temperature, and relative concentrations of ammonia, ammonium, oxygen etc.. Seamaiden is probably the authority on ammonia around these parts on a practical level.. Aquarium ppl are intimately aquainted with it..
Most hydroponics nutes stay away from ammoniacal N because the equilibriums are too tough to maintain without the plethora of buffers in soil..

thanks guys...