Developing a worrying mold on the top of my rockwool large growing blocks, its very dark green and slimy and wet and is begining to deteroate the blocks. About to start flowering and don't wan't that to affect anything.... Attached is a picture of the situation. I am watering from the bottom soaking the rockwool in warm water with nutrients. Not spraying or anything from the top. Help would be great!
- untitled.JPG (157.5 KiB)