Grow1 4.5-in Round Grow Lids - 40 Count

Dual-Sided Container Covers for Light Control - 40 Count

Open containers let in light, and light on a growing surface encourages algae and mildew. These lids give you two options in one piece: the black face blocks light, and the white face reflects it back toward your plants. The lids are dual-sided, so you choose the face that suits your setup.

This listing is one unit holding 40 round lids at 4.5 in, which suits growers outfitting a full tray or a small hydroponic system. Commercial growers can order several units to cover larger rooms.

Key Features & Benefits

• Dual-sided design — use the white face to reflect light or the black face to block it.
• Round 4.5-in size — fits round containers and openings of a matching size.
• 40 lids per unit — covers many containers with a single order.
• Light blocking — the black face helps limit algae and mildew growth.
• Flat, light format — stores and ships with little space.

Who Should Use Grow1 4.5-in Round Grow Lids

Hobby and commercial growers who run hydroponic systems or container cultivation and want to control light at the growing surface will find these lids useful. They suit anyone fighting algae or mildew around containers.

About Grow1 4.5-in Round Grow Lids

Grow1 makes these dual-sided round lids with a white reflective face and a black light-blocking face. The product measures 6 in by 6 in by 0.3 in as shipped, and the unit weighs 0.2 lb.

Frequently Asked Questions

Q: Which side should face up?
A: Face the white side up to reflect light. Face the black side up to block light at the surface. Pick the side that matches your goal.

Q: How many lids come in one order?
A: One unit holds 40 round lids. Order more than one unit for larger setups.

Q: Why block light on a container surface?
A: Light on a damp surface encourages algae and mildew. A black face blocks that light and helps keep the area cleaner.

Q: Do these work in hydroponic systems?
A: They cover containers and openings of a matching size, so check your opening against the 4.5-in diameter before ordering. Fit depends on your own equipment.

Q: What does dual-sided mean?
A: Each lid has a different color on each face. One face is white and the other is black.