hiya don't be a cheap ass,lol none of them really work proper check ya water and if it as an high pH above 7'ish use that as ya pH up if it's lowbelow 7 you can use it as ph down..so ya only need 1 of them thats what i do.......if ya ppm is t high add water and it comes down if it's too low add nutes till ya get ya desired ppm..it go's up..gluck
mickrick Reviewed by mickrick on . pH when to check? Hello! I am growing hydroponically in a 5 gallon bucket with a rockwool cube. Also using Fox Farm Hydroponic nutes. I have a hannah ph/ec reader. My question is when do I check the ph? I change the solution once a week. Do I check it right after changing the solution? Do I wait a day? I'm barely getting my calibration stuff this week so I'll FINALLY get to start using my meter! I just wanna make sure I do it correct the first time.:thumbsup: Rating: 5