I just changed the resevoir again and cleaned the whole system with a a little bleach. I still don't know what the problem is but there seemed to be a bit of algae or maybe just some sediment on the bottom of the reservoir like I would find at the end of a 7 day reservoir.
What I am going to do since this has never happened to me before (quick pH drop and cloudy rez) is to eliminate a few things that I am trying differently. My last grow I didn't use Cal-Mag or Silica Blast until mid-flowering, and even then I'm not sure if it did anything. I use RO water so it sounded like something I needed by advice from other growers.
Stormcooker Reviewed by Stormcooker on . Reservoir problem.....Zandor? I'm onto my next grow. I am using Flora Nova nutrient feeding chart in the clone phase (light nutes). I also use half strength Cal-mag, and half strength Silica Blast. I use RO water too. I have not yet added the recomended amount of Floraliscious because I'm waiting on a delivery of new Floraliscous Plus. I have a constant PH monitor. I start out around 5.5 and it naturally drifts upward over a day or two to 6.0 before I knock it back down to 5.5 or so. This has always been my routine. Rating: 5