Rockwool Cubes going green... why?

[steeltownstoner]

Thanks everyone! Wow, away for one day and already a myriad of responses. i think i have some black plastic left over from when i wrapped from frame (think they called it panda). This should be thick enough to block out the light, yes?

steeltownstoner Reviewed by steeltownstoner on 10-30-2008. Rockwool Cubes going green... why? Hey Everyone, I'm currently in the process of my 1st indoor grow, with a small 2x4 ebb and flow table. My seedling cubes were placed into 4" grodon/rockwool cubes about a week or so ago and feed with DNF Grow A+B 3 times a day on a 30 minutes cycle. I've been noticing the cubes are starting to get a little green and was wondering what conditions could be causing it. Any SUGGESTIONS? My specs can be found on my grow log, but just to summarize: lighting - 4 x 42w CFL bulbs (2 - Rating: 5

[IAmKowalski]

Can you see light through it? If yes - then no. If no - then yes. Or something like that :-)

Actually, it's not even critical that it COMPLETELY block light, I think the last time I just used plain old white kitchen garbage bags - double layered 'cause the stuff is pretty thin, but that was enough to keep algae from growing.

[stinkyattic]

Panda is perfect. White side up, black side down. Leave it loose for air flow so you don't get rot.
LOVE that shit. LOVE IT!