Those are products for fish, not plants. I know because I use them. Get something specifically for plants. The ph stuff will make your ph 7. No matter what. 7. That's what it does. If you are growing hydro this number won't work for you anyway but is ok for soil. If you take the time now to do things the right way I can promise you it will save you a LOT of heartache later. Get ph stuff for plants. Don't use stuff for fish (Chlor-out) Get a TDS pen. That is the absolute best advice I can give you.