Grower's Select SMALL Mushroom Monotub Fruiting Chamber with Filter Disks and Liner 28Q
Grower's Select SMALL Mushroom Monotub Fruiting Chamber with Filter Disks and Liner 28Q is backordered and will ship as soon as it is back in stock.
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Description
Description
The Grower's Select Small 28Q monotub is our compact 12" cube — a heavy-wall 28-quart tub with four 2.5" adhesive filter disks, four hole plugs and a custom pre-cut liner, sized for a single grain jar or half a spawn bag.
It is the right tub for a first bulk grow, for testing a new strain before you commit a big tub to it, or for tight spaces where a wide tub won't fit. The same thick walls and stiff base as our larger tubs.
- 28 qtCapacity
- 12×12×12"Outer size
- 4Filtered holes
- 4–5 lbsBulk substrate
- 200 lbsBase load, no flex
Why growers pick Grower's Select
- Thick walls, stiff base – Molded from super-dense polypropylene with extra-thick walls. The bottom holds 200 lbs without flexing, so a loaded tub doesn't bow and crack the substrate cake when you pick it up.
- Ready out of the box – Holes are pre-drilled and every tub ships with 2.5" adhesive filter disks, hole plugs and a custom pre-cut liner. No drill, no hole saw.
- Filtered fresh air exchange – The filter disks let the tub breathe while keeping airborne contaminants out; the plugs close the holes during colonization.
- Stacks ten high – The reinforced base supports stacking up to 10 tubs.
- Our own tub line – Grower's Select is our in-house tub and we own the molds, so the spec stays the same from one run to the next.
What's in the box
- 1 × Grower's Select 28-quart polypropylene monotub with lid (12" × 12" × 12")
- 4 × 2.5" adhesive monotub filter disks
- 4 × hole plugs for colonization and airflow control
- 1 × custom pre-cut UV-sterilized monotub liner
How to run it
- Line the tub. Fit the liner into a clean tub. It keeps substrate off the plastic, helps prevent side pinning, and makes cleanup a matter of lifting it out.
- Plug the holes and spawn. Insert the plugs, then mix one 24–32 oz grain jar or half a spawn bag into 4–5 lbs of pasteurized bulk substrate — roughly 1 part grain to 3 parts substrate. Level the surface.
- Colonize. Keep the lid on and the plugs in at room temperature until white mycelium covers the surface.
- Switch to fruiting. Pull the plugs so the filter disks can exchange air, give the tub indirect light, and keep the surface humid.
- Harvest and repeat. Pick each flush, rehydrate the cake, and run more flushes. When the tub is spent, pull the liner and wash the tub for the next grow.
Real results from a Grower's Select 28Q monotub.
Size guide
All three Grower's Select sizes share the same design. Amounts are guidelines — adjust for species and substrate depth.
| Size | Outer dimensions | Holes / filters / plugs | Grain spawn | Bulk substrate |
|---|---|---|---|---|
| Small 28Q (this tub) | 12" × 12" × 12" | 4 / 4 / 4 | One 24–32 oz jar or ½ spawn bag | 4–5 lbs |
| Medium 44Q | 18" × 15.5" × 12" | 6 / 6 / 6 | One spawn bag or two 32 oz jars | 7.5 lbs |
| Large 66Q | 22.5" × 15.75" × 12" | 6 / 6 / 6 | Two spawn bags or 3–4 × 32 oz jars | Up to 10 lbs |
Specifications
| Specification | Detail |
|---|---|
| Brand | Grower's Select |
| Capacity | 28 quarts |
| Outer dimensions | 12" L × 12" W × 12" H |
| Material | Super-dense polypropylene, extra-thick walls |
| Base | Reinforced; holds 200 lbs without flexing; stacks up to 10 tubs |
| Air exchange | 4 pre-drilled holes |
| Filters | 4 × 2.5" adhesive filter disks |
| Plugs | 4 hole plugs |
| Liner | Custom pre-cut, UV-sterilized |
| Recommended load | 1 × 24–32 oz jar or ½ spawn bag + 4–5 lbs bulk substrate |
Need spawn and substrate?Pair the tub with colonized grain spawn and bulk substrate, or start with a complete monotub grow kit.
Common questions
How much spawn and substrate does the 28Q take?
One 24–32 oz grain jar or half a spawn bag, mixed into 4–5 lbs of pasteurized bulk substrate.
Do I need to drill anything?
No. The air exchange holes are pre-drilled, and the adhesive filter disks, hole plugs and liner are included. Peel, stick, line the tub and spawn.
What do the hole plugs do?
Keep the plugs in during colonization to hold in humidity and CO2, which mycelium likes. When the surface is fully colonized, pull the plugs so the filter disks can exchange fresh air and trigger pinning.
Is the tub reusable?
Yes. Pull the liner at the end of a grow, wash and disinfect the tub, then fit a fresh liner and filter disks for the next run. Replacement lids are sold separately.
Which size should I buy?
The 28Q is for small grows, strain testing and tight spaces. For a bigger harvest per run, the 44Q takes one spawn bag and 7.5 lbs of substrate, and the 66Q takes two spawn bags and up to 10 lbs.
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