Cultiwool Block w/ Optidrain - 6 x 6 x 6-in - 48 Count

Even Water Distribution and Drainage for Hydroponic Blocks - 6 x 6 x 6 in

Uneven wetting and water pooling under a block make root zones harder to manage. This Cultiwool block addresses both with a donut ring water chamber around the plug hole and drain grooves on the underside. The donut ring gives your dripper a set position, so water spreads more evenly through the stonewool.

The 6 x 6 x 6 in size suits growers moving plants on from starter plugs into a larger substrate during vegetative growth. Each unit contains 48 blocks, which suits a regular indoor setup or a larger commercial room.

Key Features & Benefits

• Donut ring water chamber — holds the dripper in place and spreads water more evenly through the block.
• Drain grooves underneath — improve water flow beneath the block and reduce contact with the surface it sits on.
• Black/white foil — helps limit algae growth on the block.
• Stonewool material — a standard hydroponic substrate for hydroponic systems.
• 38mm / 40mm plug hole — takes starter plugs of that size.

Who Should Use Cultiwool Optidrain Blocks

Growers running drip-fed hydroponic systems on cultivation tables or hard floors, from home gardeners to licensed commercial operations, will find these blocks useful.

About Cultiwool Optidrain Blocks

Cultiwool Optidrain blocks are stonewool growing blocks measuring 6 x 6 x 6 in (150mm x 150mm x 142mm). Each has a 38mm / 40mm plug hole, drain grooves and a donut ring water chamber. Each unit holds 48 blocks.

Frequently Asked Questions

Q: What is the donut ring?
A: It is a water chamber moulded around the plug hole. You place the dripper in it so water spreads evenly through the block.

Q: Why does the block have drain grooves?
A: The grooves improve water flow under the block. They also reduce contact with the table or floor surface.

Q: How many blocks come in one unit?
A: One unit contains 48 blocks.

Q: What does the black/white foil do?
A: The foil wrapping helps limit algae growth on the block surface.

Q: What plug size fits?
A: The plug hole is 38mm / 40mm. Check your starter plug size before ordering.

Q: What size is the block?
A: It measures 6 x 6 x 6 in, or 150mm x 150mm x 142mm.