Rockwool in wilma system turning green.

hey the rockwool in my wilma hydroponic system is turning green, the water in the tank is clean and the green doesn't feel slimey. Is this because of the light or is there another problem ? is this a serious problem or can i sort this out easily? could someone help me out please
thanks

just algae, no big deal, just try to cover the tops of the rockwool.

smppro said:

just algae, no big deal, just try to cover the tops of the rockwool.

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kk thanks is that because iv no air stones, will i get some air stones and get that h202 stuf and put i couple of drips in my tank.

its not long before they explode. you have 25 minutes to evacuate

eyeballsaul said:

kk thanks is that because iv no air stones, will i get some air stones and get that h202 stuf and put i couple of drips in my tank.

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Just keep your system clean, try to prevent light coming into contact with any wet surface or the water itself, algae isnt the worst thing you could.

smppro said:

Just keep your system clean, try to prevent light coming into contact with any wet surface or the water itself, algae isnt the worst thing you could.

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kk cheers im going to make covers to cover all of the tank and clean it out thanks for your help