These plants in the RDWC are drinking about 1.2 gallons a day right now. Water level goes down and PPM goes up so to me that means they are not eating all they have available, but when I top off I add more nutrients to get the balance back to around 1200 PPM. Right now my Brix is at over 20%, thats a new high for me, thanks to Lumina ($$) and Tribus mostly and the Sap PH is at 6.6 that is telling me it needs a little more N, P & S. That confuses me becasue from what I have read too much N lowers Brix and Jacks A&B grow mix is a combined 20-12-26 assuming it works that way.
So it seems I have great bacteria culture going on and if I drain the res and replace the water I know I am killing most of that bacteria. So I am thinking of not doing a complete change out and just slowly adding Bloom nutes with the idea eventually the plant will use up most of the Grow mix and go for the Bloom mix instead. What are your thoughts on that?
My system has 4ea 5 gal buckets that are interconnected they have 2 or 3 gallons of nutes in each depending on the roots. a float valve keeps them topped up continuously and I replace 2/3 of all once a week. I use Jack's or Peter's Hydro nutes with calcium nitrate and epsom salts in a 3-2-1 dilution.