well im not sure if there is a such thing as too much oxygen in the water but remember those general hydroponics water farm systems have up to four oxy stones in one bucket.
yeah i cant find those drains anywhere else either, and check out my profile pic gallery u can see the diff in 2 extra weeks of veg and my setup
yeah i cant find those drains anywhere else either, and check out my profile pic gallery u can see the diff in 2 extra weeks of veg and my setup