Also you should be using ph up and ph down from a hydro store....not a pet store. The ones for fish are too high in salts for hydro and can harm your plants.
Weedhound Reviewed by Weedhound on . my PH up and PH down isnt working! I bought ph up and down from the local pet store but it doesnt seem to do much unless I add alot..(i have a hydro system with 2 gallon buckets for each plant) ...does anyone have any recomendations for adjusting PH? Rating: 5