Encomium
Active Member
I've just noticed a white paste-like substance on at least one of my 5x5 inch rockwool slabs. The substance is damp, looks a bit like Elmer's glue and when rubbed together feels a tiny bit grainy and slimy but not sticky. It's grown approximately 1/4 inch above the top of the rockwool and about 1/2 inch diameter. I *believe* this is either salt build-up, algae or maybe even mold.
I was planning on just scraping this gunk off the rockwool and completely covering up the rockwool to prevent light hitting the RW. Today is also a reservoir change day so I'll be cleaning my rez and grow tray out.
I was wondering if I could also use a solution of H202 directly on the rockwool, basically leaching the medium with a h202 solution, with no harm to the root zone?
I do use inorganic nutrients (dynagrow) and typically do use h202 but it's always added to the rez and not directly to the plants. This would seem to be fine but hopefully someone that reads this can reassure me.
Cheers and thanks for the help!
I was planning on just scraping this gunk off the rockwool and completely covering up the rockwool to prevent light hitting the RW. Today is also a reservoir change day so I'll be cleaning my rez and grow tray out.
I was wondering if I could also use a solution of H202 directly on the rockwool, basically leaching the medium with a h202 solution, with no harm to the root zone?
I do use inorganic nutrients (dynagrow) and typically do use h202 but it's always added to the rez and not directly to the plants. This would seem to be fine but hopefully someone that reads this can reassure me.
Cheers and thanks for the help!