The stuff for aquariums will work, but the stuff designed specifically for hydro works better. The aquarium usually isn't as strong, so you end up needing more of it (and paying more). Also the hydro stuff is designed specifically for plants. It's made from Potassium Hydroxide (pH Up) and Phosphoric Acid (pH Down). Both of these break down into stuff that actually feeds your plants.
Help_Needed Reviewed by Help_Needed on . PH adjustment I was going to order some PH solution but I have recently come across a PH adjustment solution for aquariums that I already have. I was just wondering if it was basically the same thing as that for hydroponics? If so I will just use that for now to get my setup ready for my first grow. Rating: 5