Welcome to the Farm!
I grow in rockwool with 2 wide open 1/4" tubes going to each plant; that run continually when the lights are on. The 20 gallon reservoir gets topped up with ro water and full strength nutrients including cal-mag, every day (13-16 gallons/day by end of stretch). Like rockwool, coco is inert and must be fed up to twice per day during heavy growth.
Never let coco dry out it'll become hydrophobic -
- Goes hydrophobic: fibers shrink, pull from pot walls; water beads and channels past roots instead of soaking in.
- Salt/EC spikes: as water leaves, salts concentrate; first re-wet can dump a hot mix on roots → burn.
- pH/biology drift: micro-life stalls; fine root hairs die back; medium structure tightens.
Good luck, Happy Growing!

