I'm going to be using RO water. I'll stick to using it everytime I change my res. Was just confused because latewood says he starts with RO water, and only adds calmag when he tops off his res.
gbf4ever Reviewed by gbf4ever on . Calmag Question About to start my first hydro grow in a few weeks. Had a quick question about calmag. From my understanding your supposed to add 1-2 tsp per gallon. In the latewood legacy thread he was saying to only use calmag in the water you use to top off your res. Which is the better option? Rating: 5