6" Rockwool Block Cover, pack of 40

Reflective Dual-Sided Media Covers

These 6" plastic block covers reflect light back to plant leaves while blocking light from reaching the growing media, helping reduce algae and mildew growth.

Dual-sided and sold in a pack of 40, they work well with GRODAN blocks and are sized for larger rockwool blocks.

Key Features & Benefits

• Reflects Light to Leaves — Directs light back toward plant leaves.
• Blocks Light From Media — Helps reduce algae and mildew growth.
• Dual-Sided Design — Usable on either side of the cover.
• Pack of 40 — 40 block covers included per pack.

Who Should Use 6" Block Covers

Growers using larger rockwool blocks who want to reduce algae and mildew growth while directing more light to plant leaves will find these covers useful.

Compatible Rockwool Sizes

These block covers are available in 4 inch and 6 inch sizes and work well with GRODAN rockwool blocks of matching dimensions.

Frequently Asked Questions

What size blocks do these cover?

This 6" size is sized for larger rockwool blocks.

How many covers come in a pack?

40 dual-sided covers per pack.

Do these work with GRODAN blocks?

Yes, they work well with GRODAN blocks.

What is the other size available?

These covers are also available in 4 inch size.