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KIS Organics 50-Gallon Microbulator Compost Tea Brewer

Name: KIS Organics 50-Gallon Microbulator Compost Tea Brewer
Brand: KIS Organics
SKU: TEA-MICRO-50GAL
Price: 389.00 USD
Availability: InStock

4.5 out of 5 Read 4 reviews

$ 389⁰⁰

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A commercial-grade aerated compost tea brewer designed with soil biologist Tim Wilson of Microbe Organics. It delivers high dissolved oxygen and constant circulation using air alone, with no microbe-damaging water pumps.

Key things we want you to know

You'll need: a standard 55-gallon plastic barrel (not included).
Circulation: 6.3 gallons per minute, cycling all 50 gallons every 8 minutes.
Two modes: free suspension or extractor bag.
Cleaning: fully dismantles in under 40 minutes.
Shipping: free standard shipping in the continental USA (excludes AK, HI, territories and APO/FPO).

Benefits & Features

Product Features & Specifications

Air-Driven Active Circulation: High-efficiency airlift housing circulates 6.3 GPM using air alone, preventing dead zones without shearing delicate fungal hyphae or protozoa.
3-Way Oxygenation Mechanism: Combines in-pipe diffuser injection, fine-bubble surface agitation, and a high-fall return nozzle that breaks surface tension for maximum CO₂ gas exchange and O₂ absorption.
High Dissolved Oxygen (DO) Maintenance: Consistently maintains DO levels between 8.8 and 9.8 PPM across 24- to 48-hour brew cycles.
Commercial Air Pump Included: Powered by a durable 3.5 CFM diaphragm air pump (backed by a 1-year manufacturer warranty).
Custom PVC Diffusers: Features machine-slotted PVC diffusers designed specifically for heavy biological agitation.
Versatile Application: Run in free-suspension mode for maximum biological density, or use the included extractor bag for low-particulate foliar applications.
Instructional Resources: Includes operational and assembly video tutorials.

Engineered for High-Density Living Soil Biology

Developed to surpass standard commercial brewers, the Microbulator continuously extracts and multiplies beneficial soil microorganisms, including bacteria, archaea, fungal hyphae, flagellates, and amoebae. Its high-flow design ensures uniform microbial distribution throughout the barrel—simply hold a container under the return nozzle to pull clean, representative samples for microscope evaluation.

Brewing & Equipment Configurations

Free-Suspension Mode: Compost is added directly to the water for maximum biological yield. After a 24-hour brew, remove the apparatus, allow heavy solids to settle, and pump off the liquid.
Extractor Bag Mode: Place compost inside the included mesh extractor unit. Highly recommended when using coarse compost (1/2" to 1" pieces) or when preparing tea for fine foliar spray nozzles.
Optimal Brew Times: 24 hours when paired with KIS Organics Compost Tea Brewing Kits.

Application & Mixing

Keep the air pump running while lifting the apparatus out of the tea to prevent liquid backflow into the diffusers and air lines. Disassemble the PVC components and flush thoroughly with fresh water, a soft scrub brush, or a pipe cleaner. Extractor bags should be rinsed immediately after use and can be washed using an oxygen bleach cleaner like OxyClean.

Lab Reports & Resources

Reviews (4)

I’m very happy with my purchase

I’m very happy with my purchase., Cindy was very helpful, I had an excellent experience., thanks everyone at KIS Organica.

Perfect. I even shaved it down to fit a 30g brute

Made it simple. Saves you the multiple trips to the store to get everything.

Splish Splash we're having a bath

The Microbulator overall seems like a good design. The thing splashes quite a bit of water when using. Which may or may not be an issue for you. I've put a trash can lid over the unit while in use to stop it splashing out of the barrel. The pump is nice and quiet. For the price I could have honestly built this for less. When I read the unit had some sort of a custom designed "diffuser" I thought it was something internal to the unit more than just some pieces of PVC fittings to build the base. Unless I'm missing a piece Overall if it aerates as well as it claims I will be happy with the purchase.

50 gallon Microbulator (Compost Tea Brewer)

Excellent, all-around, from customer service to the equipment.