Hey infexion
As soon as my roots hit the water I remove the feeder tubes as well as the water pump. I have had no issues. Reasoning is a; during the hot months the pump was adding a few degrees to my already 80 degree res and b; if it's unnecessary to have the pump in the res, it should be taken out as you can avoid crap in the filterand some bad things that can go with that. I actually thought my aunties started growing faster once they had to reach for the water vs bottle feeding them with the pump and tubes.
Peace
Sam
My first grow I left the pump in until week 4, not a big deal removing it, but I did have to deal with roots tangled in the lines. I just got the pump and lines out and trimmed up the roots to make sure I didn't leave any in the res.
but the second grow now I took them out right after I saw all plants had roots in the water. They have since taken off, just what I expected once the roots hit the water. I just wanted to get the pump out before I had any issues removing it once the roots got too thick like last time.