I’m straight coco atm… started with like 70-80pots, culled down to like 40-50 maybe? You can see my grow log here: https://overgrow.com/t/dannyterpintines-digging-for-diamonds-pheno-hunt-room/40588/62
I’d say it depends on how established your plants are. If they have all completely filled the pots with roots - you’re looking at 2x a day watering.
I do not water to run off. I am currently watering 2x a day with a wand and pump. I hand watered them before too… not fun but I’d say somewhere around 0.50-1.25L per pot, per watering.
Like GramTorino I’m at the 800-900ppm (ppmx700) range for fully established plants.