Ph minus

Will using this PH Minus that is meant for swimming pools be OK to use in balancing the ph in my water? Im pretty sure it wont cause any problems but i just want to make sure. thx for the help in advance!

No its not plant friendly. Get some phosphoric acid 81%, very cheap.

i use general hydroponics ph down but it seems to take alot but defenitly dont use that shit

fuck..........

ok thx for the help fellas, where can i find phosphoric acid 81%? I have no hydro stores near me at all, only HD, Lowes and a couple of small nurserys, cant order anything online atm.