What do the plants look like, are they showing any negative signs
I don't know why this got double posted??........
anyways, I don't measure oly, just use it till my ph is correct in the feed. A way to use more is to drop starting water with Hades down to 4.5ish and then add HERC & Oly to ph needed. I don't use any microbes or SLF at first either when trying to correct soil ph. And like bubba mentioned, at this point you should have an idea of how much feed water they take and how often......consistency is key when building and ramping up metabolism through bloom.
Like for me, I'm a steady every other day at lights ON feed, 4 gallons feed for (6) 5 gals......that's a little more than 1/2 gallon each, and recently I pushed it a day longer to see what I can get away with because I just added a TopD & straw mulch which can maintain moisture a bit longer, plus I wanted to see if feeds needed adjusting because of the topD. I Will have more feedback once I slurry later this week but they are all praying hard so will continue to read the plants and feed every other day. I havnt had to Herc flush or reset or maintenance flush on this run at all, but this comes from knowing the line and feeding according to slurry #s and not just running down the feed chart.
IMO the feed feed tea feed feed flush is for growers with a heavy hand on the nutes, which most New growers do, so the flushes and constant teas help to get growers new to the line through a full cycle with relative success. If feeding too light or by the slurry #s, the FFTFFF doesn't work and can cause any number of issues to show up. My two cents anyways......