OldMedUser
Well-Known Member
Ah. The way you stated it I thought you were adding the pH up to the RO water first then adding nutes.I normally used pH up with ro water because I wasn't using ArmorSi before. Therefore when I mixed in the maxigrow or bloom, they would take the pH down into the low 4's or high 3's. So I had to use pH up to get it back to the right range. Once I added ArmorSi to the mix, then it started coming out pretty close to where it needed to be, but after a day or two, it would drift up and then I would use the pH down.
Carry on.