I switched to the 321 last grow and liked it. It’s in my signature if you want a look. You’re super high for EC. I got up as high as 1.9 last grow at the peak of flower, but that was too high. I’ll likely stay 1.2 EC max this run. I use 3.78 of part a, 2.52 of b and .99 grams of Epsom a gallon, just like the email they sent you. It’s a little different than it used to be, a touch more a and b but less Epsom than the original at 3.6, 2.4 and 1.2.
I tried the finish and HATED IT. Blue dyed garbage! My plants would not take it up either, ppm/EC didn’t change for 4 days, just the ph changed, constantly. I won’t use it again, but loving the 321. No calcium in the finish either, so it’s not great to run it a long time. They recommend their calcium supplement with it; more to buy. You could use the calcium nitrate, but you’re slamming a lot of nitrogen to them that way.
If you have RO water you’ll likely have a lot of ph swing on a new tank. I’m getting a big ph raise and then a drop after a few days, likely due to my .1 EC water. I’m adding some silicon to stabilize the ph and it seems better this tank.
