Cultiwool 6 x 6 x 6-in Stonewool Block with Optidrain & Donut Ring - 48 Count

Even Water Distribution Around the Plug Hole - 48 Count

Uneven wetting and badly placed drippers leave parts of a substrate block dry and others waterlogged. This stonewool block adds a donut ring, a water chamber around the plug hole, so your dripper sits in the right spot and water spreads through the block. Drain grooves on the underside improve flow beneath it, and black/white foil helps prevent algae growth.

Each unit contains 48 blocks measuring 6 x 6 x 6 in. That suits growers running hydroponic systems or cultivation tables who want a set of consistent blocks for vegetative growth and flowering stages.

Key Features & Benefits

• Donut ring — a water chamber around the plug hole that holds your dripper and spreads water through the block.
• Optidrain width grooves — improve water flow under the block and reduce contact with the surface it sits on.
• Black/white foil — helps prevent algae growth on the block.
• Stonewool material — a standard hydroponic substrate for even water uptake.
• 38mm / 40mm plug hole — accepts matching starter plugs.

Who Should Use Cultiwool 6 x 6 x 6-in Block

Growers who use drip irrigation on cultivation tables, benches or hard floors and want consistent dripper placement and drainage will find these blocks practical, at home or commercially.

About Cultiwool Block with Optidrain & Donut Ring

Cultiwool makes stonewool growing blocks. This model measures 150mm x 150mm x 142mm, with a 38mm / 40mm plug hole, width-groove drainage and a donut ring. It is sold as one unit of 48 blocks.

Frequently Asked Questions

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

Q: What does the Optidrain grooving do?
A: The grooves on the underside improve water flow beneath the block. They also reduce the contact area between the block and the surface below.

Q: Why is the foil black and white?
A: The foil covering is meant to prevent algae growth on the block surface.

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

Q: What size is the plug hole?
A: The plug hole is 38mm / 40mm, so check that your starter plugs match before ordering.