These 6 inch block covers are great for covering up the exposed part of Grodan’s Hugo 6″ block. If you have been using growing cubes for a while you have probably experienced algae growth on the tops of your cubes, use these block covers to eliminate the algae growth.
There are 40 block usable covers per package.
- For Rock Wool & Other Grow Media
- Blocks light from media reducing algae & pest problems
- Use white side up to reflect light
- Use toothpick to hold cover in place
