I got a tds/ec meter. Water out of my RO is ppm 120 so I'm guessing I need to replace the filters. I flushed for a few days and backed off the nutes. Ppm is now at 320 after adding 5 ml calmag, 2.4 ml macro, gro, and bloom to 3 gallons. I also ph'd water to 5.8 before adding nutes this time as...