Rockwool Block Covers refurbished-products Filling reservoirs for compost teas

Filling reservoirs for compost teas and microbial inoculants sensitive to chlorine and chloramines

or as a stand alone dechlorinating and sediment filter

but can be costly and inefficient when using bottled CO2 tanks

Up to 30' lamp striking distance: Separate the ballast from your reflector by 30' of distance if necessary (optional lamp cord extensions may be needed)

This highest-quality kelp is a rich natural source of over 60 chelated nutrients

Rockwool Block Covers refurbished-products Filling reservoirs for compost teasPLASTIC BLOCK COVERS Reflect light to plant leaves, where its needed most. Block light from media. Eliminate algae and mildew growth. 40 dual sided block covers per pack. Works great with GRODAN Blocks. Block light from media Reflect light to plant leaves where it's needed most Eliminate algae and mildew growth 40 dual sided block covers per pack