Welcome to the community! I think you’re right about the overwatering but I’m not familiar with coco. In soil I’m probably watering once a week at that stage
Ahhh ok ya coco will be difrent i notice that it drys much faster then soil. But i read that the peblels hold moist. Zo im gonne see what happens not watering for 2 days.
For best results in coco think hydroponics, not soil. Nutrients in all water, one or more feedings to 20% runoff at each feeding daily. However, with the small plants and large containers you can go a day or two between feedings. Check runoff ec, if it is + 300 or more than input ec you should increase feed frequency.
I generally flower in 1 or 2 gallon pots and feed to runoff 3 or more times every day . . . no overwatering issues here.
I grow in coco and i let my pot dry out 75% b4 i water again so from this point let it dry out till ur pot is super light then water till 20% run off, pick ur pot up feel tha weight don’t water again till ur pot is 25% saturated
My experience is to keep Coco moist. It can become hydrophobic and not absorb the water and nutes correctly causing several issues. Drop some dry coco in water and watch how long it can float.