Crop Box Tub Black Grated Base — Stackable Hydroponic Tub for DWC, Cloning & Propagation
TGG-CB-BLKGRT-23L
Pairs well with
The black grated crop box tub is the workhorse of the hydro shed. Sit it on top of a solid base tub and you've got an instant DWC or ebb-and-flow system. Fill it with LECA, drop in a few clones, and let the roots dangle into the nutrient bath below. Tough, stackable, and built to handle Aussie sun without warping. Available in 23L for benchtop propagation or 45L for full-on grow runs.
Specifications
Which Size Should You Pick?
The 23L is the shallower option (12cm deep) — perfect for propagation trays, clone stations, and benchtop builds where headroom is tight. The 45L is nearly twice as deep (21cm), giving roots more room to develop and holding a much bigger nutrient reservoir below when paired with a solid base. Both share a similar footprint, so they fit standard grow bench spaces.
- Pair with a solid base tub of matching size to lock in a full DWC system.
- Fill the grated tub with LECA clay pebbles and plant directly into the medium — roots will find the water below.
- Drop an air stone and air pump into the solid base for oxygenated roots and faster growth.
- For mass cloning, drop in a propagation lid with site holes and you've got room for dozens of cuttings at once.
- Use the 45L outdoors as a worm farm or compost tea brewing tub when not in the grow room.
How To Build A DWC System With It
Pairs Well With
The matching solid base tub that goes underneath. Holds water for DWC, ebb-and-flow, or use as a nutrient reservoir.
Crop Box Propagation LidPre-drilled lid that turns your crop box into a clone station. Drop net pots straight in and let roots reach the water below.
Crop Box Standard LidSolid lid for sealing tubs in storage or transit. Keeps dust, pests, and light out when the crop box isn't in active use.
LECA Clay PebblesThe go-to grow medium for crop boxes. Lightweight, reusable, and pH-neutral — ideal for DWC and stacked-tub systems.
Water & Air PumpsKeep the nutrient bath oxygenated and circulating. Pair an air pump with an air stone for thriving DWC roots.
Water Heaters & ControllersHold your reservoir at the sweet spot (18-22°C) for max root uptake and to dodge cold-water stress in winter.
FAQ
Can I use the grated base tub on its own?
Yes, but water will drain straight through. The grated base is designed to sit over a solid base tub so water collects below and roots dangle down to reach it. On its own it works as a colander, drain tray, or harvest sorting tub.
What's the difference between the solid and grated base versions?
The solid base holds water — ideal as a reservoir, mixing tub, or the bottom half of a DWC build. The grated base drains freely and sits on top of the solid tub, letting roots reach down into the water below while keeping the growing medium contained above.
Will grow wool slabs fit inside?
Yes. The flat base accommodates standard hydroponic grow wool slabs as well as individual media pots, propagation plugs, and net pots. Great for running a tray of clones or seedlings as one unit.
Can I use it indoors and outdoors?
Yes. The UV-stable plastic handles direct sun, heat, and humidity without warping or cracking, so it's just as happy in a grow tent as it is on a patio or in a greenhouse.
Can I stack two grated tubs on top of each other?
No — the grated bases need a solid base underneath to hold the water. Always pair a grated tub with a solid base tub of matching size for a working system.
Which size should I get — 23L or 45L?
Go 23L for cloning, seedling trays, and benchtop builds where space is tight. Go 45L for full grow runs, bigger root zones, and more nutrient capacity in the reservoir below.
Are lids available to fit these tubs?
Yes. The standard lid seals the tub for storage or transit, while the propagation lid comes pre-drilled with holes to drop net pots in for clone stations and DWC setups.
Select Size
Build Your DWC System Today
Stack a grated tub on a solid base, drop in some LECA, and you're growing in a weekend. Free shipping over $499*.