I have situation in 3gal pots coco perlite mix. Feeding 2 times 1200ml getting 10% runoff. Input EC 800 output came out yesterday at 350. Poured 4 l of 800ec solution through each pot EC output at about 500-550. Do I need to up to 3-4 times a day? I need to put them in flower ASAP so I want to tune in EC. Im waiting to final part for automation to come so now im hand watering.
Need maybe not benefit yes. If you are starting this method in the middle of your grow I would run 3 gals of 800 ppm nutrient solution through each pot. Then feed 750ml per feed and adjust the frequency so you get 10-20% runoff for each feed.
The fact that you are adding 1200ml and only getting 10% runoff means the coco is getting to dry and the plants are eating almost all the nutrients from the media before you are feeding again.
Since you are hand feeding you may not be able to keep up with the recommendations but yes feeding more often will help stabilize your numbers.