It's also said to leave complete dark the last 3 days. No truth or proof to either one. As for the spa ph reaper is right , much more chem's than you want. I have been around pools and maintanace enough to know. You can get ph up and down where you get the nutes. If not the comercial greenhouses use sulfuric acid, that's right battery acid and it works good but just a drop goes a long way. You can get at auto shops.

The lucas formula is 1 part micro 2 parts bloom. Then adjust the ppm's for the stage of the plants life. No grow in the lucas and that would make 5-10-9. Easy to follow and no need for gro part. The nutes have ph buffers in then for stability.

FloraGro
2-1-6
FloraBloom
0-5-4
FloraMicro
5-0-1
LOC NAR on probation Reviewed by LOC NAR on probation on . Few Questions I was wondering what type of PH Down people use for there hydroponics, systems. I have been using Spa Guard PH Balancer, which keeps my water PH stablized. However I am thinking that using this Spa Guard to balance my water, may mess up my plants. I have been using it for a while, plants seem to grow great in the veg state, but when I use it in my flowering room, my plants seem to do poorly. I use Flora grow, Micro, and Bloom I use the Lucas Formula Grow-Micro-Bloom veg 18/6 Rating: 5