Rockwool_Avoiding Algae

Discussion in 'First Time Marijuana Growers' started by product78, Jun 15, 2013.

  1. I'm using rock wool as a seed starter. It has become clear that I need to protect the rock wool from the light in order avoid algae buildup. I was wondering what methods are used to do this. Can you implat the rockwool into coco coir. I have tried burying it with hydration, but if the lights are strong enough, the alge still grows on the rock wool. I'm using a 1000 watt metal halide in a cool tube at 2 and a 1/2 feet.


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