Everyone has a different way of growing and if what you are doing is giving you the results you want then that's all that matters.
Most coco growers including myself will get increased growth rates with multiple feeds per day. Usually when my plants look unhappy I just increase the waterings and they perk up within a day or 2.
From what you've said it sounds like you have several years growing under your belt and you've been quite methodical in keeping the parameters consistent. So is this problem only happening in your current run and is anything different to the last run? Same strain and feeding as the last successful grow?
After talking it up about high EC giving you better quality you are gonna need to lay it down. Everyone wants to see pics of your plants and finished product so let's see them
After this experimenting we've found that raising the light percentage in the middle of week 5, was better than raising the light percentage end of week 3. Also, part of regimen was that if we notice the eating slow down, then we need to back off the PPM, but the team caught it later into week 6, so now that we're at the end, we're going to flush 2 days in a row with diluted nutes and then cut our PPM to 1200 and see how things go from there.
The funny thing is that I've done a lot of research on COCO and we specifically use Mother Earth with perlite. All my research has pointed me towards multiple watering throughout the day, but here's my experience with that.
When I move from domes, to red cups it takes about 5 days for the cups to dry. Once I noticed a little bit of wilting, I hit them with a feed and couple days after that they're thriving.
After the first 5 - 7 days post transplant into red cups, we're hitting them with nutes at about 1000 - 1200 PPM
Also, once in red cups we put them under the Gavitas at about 55% light intensity. Every 2 - 3 days we raise it, our goal is to hit 100% by week 1 of flower.
Once the plants have a nice rootball in the red cups, we move to 3 gallon pots. After we transplant we splash the middle of the coco where we transplanted about 1 - 2 seconds.
Once this dries out, we start watering around the plant and increasing the water amount.
It takes about 4 weeks from red cup to 3 gallon fabric pots for us to be ready to flip to flower at 100% lighting and a well manicured plant. At this point by the last week of Veg we're feeding .25 gallons of water 30 minutes after the lights are on, and then 5 hours later, we hit them with another .25 gallons. By the next day lights on, the pots are light enough to take another feeding. This helps us sustain humidity, and it allows us to tell the plant when to eat, and how much. This regime lasts usualy until about week 4 - week 5 of flower.
At about that time, we noticed the watering starts to change a bit. Some plants are good, some plants are eating less. This is what raised this thread in the first place.
Hope I didn't overwhelm with too much information lol!