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 - daylight, 2 - warm)
Air Circulation - 3 speed pilar fan suspended from ceiling
Water - pH balanced, in black rubbermaid res., with DNF Grow A+B formula

Algee from light .
Crispi :stoned:

Algae isn't bad in and of itself. Just when it dies and rots, then you can have problems.

Quote:

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Originally Posted by steeltownstoner

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 - daylight, 2 - warm)
Air Circulation - 3 speed pilar fan suspended from ceiling
Water - pH balanced, in black rubbermaid res., with DNF Grow A+B formula

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World's cheapest cube cap: Get some plastic thick enough to block light and cut pieces a couple inches larger than your cubes in each direction. Cut a slit from one side to the center for the trunk to pass through. Cover the top of the cube, fold around the sides, and hold in place with a rubber band around cube and plastic.

Quote:

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Originally Posted by IAmKowalski

World's cheapest cube cap: Get some plastic thick enough to block light and cut pieces a couple inches larger than your cubes in each direction. Cut a slit from one side to the center for the trunk to pass through. Cover the top of the cube, fold around the sides, and hold in place with a rubber band around cube and plastic.

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Agree 100% thats what I did with mine.
Leave a bit of room around the base of the stem.

Also prevents thrip infestation ^^^ and can be used over pots of soil, where thrips breed most aggressively.

I believe algae is harmless and it does not complete for food (nutes).

Although I find ants at a picnic annoying, they do not consume enough of my potato chips that I get concerned that I will go hungry.

But its awfull when they get in your pants dear Lady.
Sorry off topic.:jointsmile:

True. You have a point. Ants at a picnic are worse than algae on your rockwool cubes. :jointsmile:

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?

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.

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!