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IM4000 Dual Chamber Tumbling Composter (Black)

4.5 out of 5 stars 11,986 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Outdoor Composting Tumblers by FCMP Outdoor

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Material Plastic
Color Black
Brand FCMP Outdoor
Capacity 37 Gallons
Item Dimensions LxWxH 28 x 36 x 30 inches
Shape Octagonal
Item Weight 28 Pounds

About this item

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  • Tumbling composter – avoid digging and mixing your compost pile by hand. The tumbling design makes mixing easy and efficient. Just close the door and turn it 5-6 times every 2-3 days. In hot sunny conditions and with a proper balance of ingredients the compost can finish in as little as 2 weeks.
  • Easy to use – fantastic for beginners! The large openings and removable door make it easy to add Scraps/clippings and remove finished compost. Deep Fins on the body provide great ergonomic handholds.
  • Two composter chambers are better than one – two separate sides allow the first side to finish while leaving the second side Available to add fresh Scraps/clippings. Continuously swapping sides after finishing will create an uninterrupted flow of rich, healthy compost. Total capacity 37 gallons (5 cu Ft)
  • Durable construction – BPA free, UV inhibited, 100% post-consumer recycled polypropylene is contact safe and will not degrade under direct sunlight. The galvanized steel frame is corrosion resistant.

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IM4000 Dual Chamber Tumbling Composter (Black)
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Customer Rating 4.5 out of 5 stars (11986) 4.5 out of 5 stars (2565) 4.3 out of 5 stars (763) 4.4 out of 5 stars (113)
Price $83.99 $88.99 $73.34 $389.00
Sold By Spreetail EJWOX USA Amazon.com The Composting Warehouse
Capacity 37 gallons 43 gallons 42 gallons 106 gallons
Color Black Black Black Green
Item Dimensions 28 x 36 x 30 inches 28.5 x 26 x 37 inches 28.5 x 36.8 x 26 inches 48 x 32 x 8 inches
Size 37 gallon 43 Gallon
Sunlight Exposure full-sun

Product description


Yimby Tumbler Composter, Color Black

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
11,986 global ratings
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Top reviews from the United States

Reviewed in the United States on January 5, 2018
Style: ComposterVerified Purchase
1,715 people found this helpful
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Reviewed in the United States on October 13, 2016
Style: ComposterVerified Purchase
1,566 people found this helpful
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Reviewed in the United States on November 14, 2017
Style: ComposterVerified Purchase
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3.0 out of 5 stars Too small for proper composting
By InTartifletteWeTrust on November 14, 2017
It's a nice summer composter, but absolutely not a all year round composter, unless your climate is warm all year round.
The 37 gallons size is too small for your compost to reach critical mass and self-generate enough heat.
Furthermore, even if the double compartment seems like a good idea at first, it divides the 37 gal by half, and you end up with 18.5 gal. The 37 gal size is barely enough for 2-3 mower bags.
Due to its size, I also find the doors to be also a bit small.

I have 2 compost piles, and one tumbler. The same mix (30% green / 70% browns) with home-brewed starter, reached ~150F./ 65C. in 24hrs in the compost pile. The tumbler remained at barely above outside temp.
It is now November in MA, and I have two blocks of semi-frozen far-far-away to be composted mix. I don't foresee anything happening before June now.
I will definitively remove the compartment separator next spring.

Assembly: As many times stated by other reviews, you'll need some yoga abilities, hence a second person to help is highly recommended. I strongly suggest to not tighten all the screws at first, but to just pinch them (including the legs) and once the assembly is complete (done on a flat surface), tighten them.
Screws: For once, a company is giving you few more screws, and that is highly appreciated. That being said, I would have highly appreciated to have Allen,Torque or Phillips heads instead of those ridiculous square-flat heads. The nuts are Flange Serrated locknuts, and that's a good thing.

I like the indentations that help mixing the compost, the vents and also the fact that is not fully waterproof: Some tumblers are, and if you have too much moisture, it cannot escape, collects on the bottom and you start brewing a stinky anaerobic wet mush.

Lastly, the secret to compost [fast and well] is to have the proper ratio of green/brown, to have the correct amount of moisture and to have enough oxygen for the bacteria to thrive, so don't hesitate to mix very well and rotate frequently.
To boost the starting process, add some old compost. I, me and myself, add 1/2 cup of Milorganite* type fertilizer.

So, to sum up:
Pro: Well designed
Con: Too small
I would buy again if they increase the size to at least 60 to 80 gal.

For those interested in 'pro'per composting:
- I have attached a list of Carbon to Nitrogen ratio for different materials. (Source Clemson University)

Adding worms to your compost: Yes but no! Only do it when your compost does not heat anymore. Once it has started to cure, it's OK to add worms, i.e. Red Wrigglers. If you do it too early you will either kill them or make them move elsewhere. I don't recommend adding them directly in the Yimby as it will get too hot when left in direct sunlight. Red Wrigglers do well at 75F. and do not like below 55 or above 90.

- Home brewed compost accelerator:
5 gal warm water (105F-110F.) Do not go over 120F.
1/4 to 1/2 cup of molasses or brown sugar. Last choice is white sugar.
1/2 cup unscented household ammonia (Extra nitrogen)
2 teaspoon active dry yeast.
Mix gently, let brew for about 2hrs, mixing from time to time.
The same recipe exist with beer and soda, beer is for the yeast, soda is for the sugar.
You can apply the mix with an Ortho Sprayer set at 8oz per gallon.
Spray that at the beginning of your compost pile and spray again once the compost is advanced. The first heat spike will kill the yeast.
If you really want to go the extra mile, add a pantyhose filled with 4 cup of compost or good soil and aerate the mix with a small fish tank air pump.
And finally, for the nut job, there is the Harvard University bacterial / fungal compost tea. Normally to use on trees or lawn, but it boosts the curing and helps break down the though bit faster. Please Google green.harvard.edu + make your own compost tea
It requires Fish Hydrolysate and Kelp, all available on Amzn
The above recipe has been featured in the TV show Ask This Old House, S8E9

Clemson University
Harvard University green.harvard.edu
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716 people found this helpful
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Top reviews from other countries

5.0 out of 5 stars Sturdy Composter
Reviewed in Canada on April 28, 2018
Style: ComposterVerified Purchase
247 people found this helpful
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Martin Courcelles
5.0 out of 5 stars An outside dual composter? Say it ain't so!
Reviewed in Canada on April 13, 2018
Style: ComposterVerified Purchase
125 people found this helpful
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P. Robinson
3.0 out of 5 stars Neat and compact but does not speed up composting
Reviewed in the United Kingdom on January 22, 2019
Style: ComposterVerified Purchase
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3.0 out of 5 stars Neat and compact but does not speed up composting
Reviewed in the United Kingdom on January 22, 2019
I bought this tumbling composter 4 months ago as research for the next edition of my book (How to make perfect compost by Phil Robinson - on Kindle). I split a pile of mixed compostable material into 2. I filled the tumbling composter (which was in the sun as recommended) and turned it regularly with one half of the material and put the other half in a large pot to compost as a control. After a couple of months both looked similar, I mixed up the control as you would turn a normal heap. After 4 months there was still little difference. I did find that the tumbling makes the compost loose so it does not warm up as much or encourage worms so I firmed down one side of the tumbler and this side did have fewer weed seeds germinating at the end and more worm activity. I turn my compost bins once and get good compost in about 6 months, this tumbler did not speed it up much if at all. The tumbling composter would be very useful if you do not have some earth on which to stand a conventional compost bin and had a relatively small amount of material. This model is neat and easy to use although did take an hour or two to assemble as it had what seemed like hundreds of screws.
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14 people found this helpful
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5.0 out of 5 stars Prometteur
Reviewed in Canada on October 9, 2018
Style: ComposterVerified Purchase
31 people found this helpful
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María Santoyo
4.0 out of 5 stars No es para todos
Reviewed in Mexico on April 6, 2020
Style: ComposterVerified Purchase
21 people found this helpful
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