Midwest Grow Kits MycoClimate™ 66Q Automated Monotub Mushroom Grow Kit

The MycoClimate™ 66Q uses a dual-layer tub design where the bottom layer acts as a shallow water reservoir. The included 50W digital aquarium heater warms this water, which radiates gentle, even heat upward into the growing chamber above. This method eliminates the hot spots associated with traditional heat mats and helps maintain consistent substrate moisture throughout the grow.

Mushrooms consume oxygen and produce CO₂ as they grow — without fresh air exchange, CO₂ levels build up inside the tub and can lead to abnormal growth and reduced yields. The HEPA filter on the silicone hose ensures incoming air is clean, introducing fresh oxygen while minimizing the risk of contamination from airborne particles.

The 66Q offers a larger growing chamber and greater substrate capacity, making it better suited for growers aiming for heavier flushes or who have more growing space. Both kits use the same integrated climate-control technology — water-bath heating and HEPA air exchange. The MycoClimate™ 44Q is ideal if you're working with limited space or starting out.

The kit includes all hardware, substrate, spawn, and accessories — you only need to supply your preferred mushroom genetics. For the post-harvest phase, we also recommend using the Mycolabs 350W Mushroom Dehydrator to preserve your yield. Basic sanitation practices, such as working in a clean area and using the included hospital-grade gloves, are also recommended during inoculation.

Yes — the system is designed for beginner to intermediate growers. For those seeking an even simpler entry point, the All-in-One Mushroom Monotub Starter Grow Kit is a great alternative. The included printed step-by-step grow guide and video library access provide additional support throughout the process.

Yes — the MycoClimate™ 66Q is designed specifically for indoor growing in areas with limited natural airflow. If you eventually find yourself needing more vertical space, you might upgrade to The Mushroom Ecosphere 3.0. The internal air exchange system means the kit does not rely on ambient room air circulation, making it flexible for a wide range of indoor setups.

The included custom digital thermometer and hygrometer are designed to display readings from outside the chamber, so you can check temperature and humidity at any time without disturbing the grow environment. Minimizing how often the tub is opened helps maintain stable CO₂ and humidity levels during colonization and fruiting.