# Best monotub kits and bulk fruiting tubs for home mushroom growing Source: https://spawnrun.com/best/best-monotub-kit Publisher: Spawn Run. Picks are chosen from what each Amazon listing states, not from hands-on tests. Method: https://spawnrun.com/how-we-pick A monotub is a plastic tote with filtered holes that turns a tray of colonized bulk substrate into a fruiting chamber without a tent or humidifier. The tub holds humidity on its own, the filters let enough fresh air in to keep CO2 down, and the lid stays on from spawning to harvest. What separates a good one from a drilled storage bin is the hole layout, opaque walls that stop mushrooms pinning on the sides, a liner or smooth base for cleanup, and a size that matches how much spawn you have. A 28 quart tub takes about 1 to 1.5 lb of grain spawn and 4 to 5 lb of bulk substrate; a 66 quart tub takes roughly double. This guide compares complete kits that include sterile grain and bulk substrate, an automated tub with a fan and mister, and empty tubs for growers who already make their own spawn. ## Picks ### 1. Mushroom Monotub Large 66Q Grow Kit | Complete Mushroom Grow Kit | for Dung-Loving Mushrooms | Includes 2 sterilized Grain Spawn Bags, Bulk Substrate, Vermiculite, Filters & More! Just add Spores Large 66 quart monotub kit with two 2.25 lb sterilized grain bags, two 5 lb bags of manure-based bulk substrate, a quart of vermiculite casing and filter disks. You supply the culture. What the listing offers: - Includes everything except the culture: tub, two injection-port grain bags, 10 lb of bulk substrate and casing - Listing states the spawn to bulk ratio and the resulting 3 inch layer, so first-timers do not have to guess quantities - Tub measures 22.5 x 15.5 x 12 inches and comes with six 2.5 inch filter disks and hole plugs for incubation Limits to know: - Bulk substrate is manure based, which suits compost and dung-loving species, not oysters or lion's mane - At about 66 quarts it needs a shelf or floor space, too big for a countertop ### 2. North Spore 'Boomr Bin' Monotub Mushroom Grow Kit for Dung-loving Mushrooms Boomr Bin kit with two 5 lb Boomr Bag manure-based substrates, a 3 lb organic grain bag, 2 lb of coco coir casing and two filter sheets, for a full 1 to 3 spawn ratio. What the listing offers: - Kit contents are listed in full: tub, 10 lb of sterile substrate, 3 lb grain bag, casing and 1 and 2 inch filters - States the recommended rate of 1 lb grain spawn per 5 lb substrate - Tub holds up to 25 lb of substrate and has a light-blocking base against side pins Limits to know: - Highest priced of the non-automated kits here - Manure-based substrate limits it to compost and dung-loving species ### 3. North Spore Automated 'Boomr Bin' Mushroom Monotub Kit Automated Boomr Bin with a mini fresh air fan, a small mister with hose, a hose connector and a humidity controller, plus 1 and 2 inch filter sheets. Substrate not included. What the listing offers: - Fan, mister and humidity controller are matched to the tub, so no drilling or fitting parts from different brands - Recessed base lets several tubs stack, and lid latches stop the lid lifting when the tub is moved - Holds up to 25 lb of substrate, enough for a full bulk grow Limits to know: - Most expensive pick and still needs grain spawn and bulk substrate bought separately - Needs a power outlet near the tub for the fan, mister and controller ### 4. North Spore 'Boomr Bin' Monotub & CVG Mushroom Grow Kit North Spore Boomr Bin starter kit that pairs the tub with sterile CVG bulk substrate, coco coir casing and filters. Aimed at first bulk grows; culture sold separately. What the listing offers: - CVG substrate is low in nutrients, which the listing presents as more forgiving of contamination for beginners - Boomr Bin design accepts later upgrades such as a fresh air fan and humidity controller - Comes from an established mushroom supply brand with filters included Limits to know: - Listing does not state the grain spawn weight in the feature bullets shown, so check the product page - CVG is aimed at dung-loving species, wood-loving gourmet mushrooms need a hardwood substrate instead ### 5. North Spore 'Boomr Bin' Mushroom Cultivating Monotub with 1" & 2" Filters The empty North Spore Boomr Bin with one sheet of twelve 1 inch filters and one sheet of six 2 inch filters, for growers who already have spawn and substrate. What the listing offers: - Row of 1 inch lid holes is meant to give even fresh air exchange and prevent long, fuzzy stems - Black base blocks light from the sides, which helps stop side pinning - Food-grade tub rated for up to 25 lb of substrate Limits to know: - Empty tub only: no substrate, grain spawn or casing layer included - Filter sheets are consumables, so plan on replacements after a few grows ### 6. Myco Labs Grower's Select Mushroom 48Q Monotub Fruiting Chamber with Filter Disks and Liner Myco Labs 48 quart monotub of high-density polypropylene with six 2.5 inch filter disks, hole plugs and a liner. A middle size for a single 3 to 4 lb grain spawn grow. What the listing offers: - 48 quart size, 18 x 15.5 x 12 inches, sits between small cube tubs and large 66 quart bins - Six filtered air holes plus plugs to close them during colonization - Stackable base, the listing states it supports bins stacked ten high Limits to know: - Empty tub only, with no grain spawn or bulk substrate in the box - Lower brand profile than North Spore, the listing gives few details about the liner ### 7. Grower's Select 28Q Cube Mushroom Monotub Fruiting Chambers with Filter Disks and Liners (2 Pack) Two 28 quart cube monotubs, 12 inches each way, with eight filter disks, eight plugs and two liners. Sized for 1 to 1.5 lb of grain spawn and 4 to 5 lb of bulk per tub. What the listing offers: - Two small tubs let you split spawn and keep one going if the other contaminates - Listing gives exact spawn and bulk quantities per tub - Compact 12 inch cube fits on a kitchen shelf or in a closet Limits to know: - Each tub has four air holes, fewer than the larger tubs, so fresh air exchange is lower - Small surface area per tub means smaller flushes than one large bin ### 8. Boomer Shroomer Inflatable Monotub Kit, Mushroom Growing Kit Includes a Drain Port, Plugs & Filters, Removeable Liner [Patent No: US 11,871,706 B2] Inflatable monotub with a hard bottom, clear inflatable walls, a removable liner, a drain port and ten 1 inch filters with ten plugs. Inflates to 19 x 11 x 11 inches. What the listing offers: - Collapses flat for storage between grows, useful in apartments - Drain port makes it easier to remove water after soaking or misting - Clear walls let you check pins without opening the lid Limits to know: - Inflatable walls are less rigid than a molded tub and can be punctured - Clear sides let light in, so pins may form along the walls unless the liner covers them As an Amazon Associate I earn from qualifying purchases.