Hello, I have a 2 site RDWC UC setup and I was just curious about water level for seedlings vs veg. What I have read is that when they are younger, you raise the water level up into the netcup a bit to allow the hydroton to stay wet, but once they are rooted a bit you lower it to about 2-3 " under the netcup? Also, Should I change this res out after only 1 week? It seems like its done nothing but recirculate. The plants haven't really been feeding off it, other than what ive been hand watering them. Although the air hoses are starting to get a bit slick. So it would be best im assuming?