Mantis 4000 00 02 ComposT Twin Composting Bin

The Mantis Compost-Twin 2-chamber rotating composter is the composter’s dream come true. Now you can “cook” one batch while you add organic scraps to another with no mess, no odors, and no hard work. It is built with a sturdy tubular frame and features fully enclosed chambers and four aerator vents. The easy-to-turn handle and gear system makes for easy mixing. The composter’s chambers each have a 10-bushel capacity.
User Ratings and Reviews
3 Stars Compost Twin
Talk about a nightmare to put together! Two people and three hours (and must swearing) later, we finally got it put together. So far, so good, and I’ll let you know how it goes in the spring.
5 Stars Meets expectations
OK, it isn’t cheap. And you need to assemble it. And it is kinda large. But I love it. Just what I wanted - large capacity, easy to turn, well made. The doors are thin, but seem to be adequate for purpose and the latches are excellent.
Assembly takes some time, but isn’t hard. You WILL need a helper for some things, but I did most of it by myself. Took about 90 minutes. Read the instructions first, then go back and assemble. Instructions are accurate.
The thing is big - you need about a 3 x 5 foot area for it.
I have loaded both sides with grass, leaves, scraps, etc. Should have some nice compost for the spring.
5 Stars Great Composter. It really makes compost in two weeks.
I was skeptical about the claim of making compost in two weeks–my previous stationary composter from Price Club took about a year. But now two weeks later, I have about 10 cubic feet of compost. I don’t have a chipper-shredder, so I chopped up the big pieces with scissors.
One reviewer had trouble removing the doors–my doors don’t have this problem–they come off and go back on easily.
Unfortunately, I can’t get my wheel barrow under the composter without bending the composter’s metal frame. I wish it had two more inches of room on the bottom.
For those wondering whether they can use all the compost this thing can make–don’t worry. If you want to mulch an 8000 square foot garden with 3 inches of compost, you’ll need 2000 cubic feet of compost. You’ll easily use all the compost you can make.
At first, I wondered whether such an expensive composter could pay for itself. So I computed–it can make about 200 cubic feet of compost/year. Compost costs about $1/cubic foot. So it makes about $200 worth of compost/year. It’ll easily pay for itself.
5 Stars Keeps the Bears Out
It’s working and keeps the Bears Out, I can hear them tumbling it at night but they can’t get in. A little heavy to rotate, but I still love it.
4 Stars Love it - keeps the rats out
Honestly, we were getting rats. Lifting the compost off the ground solved the problem and now we get faster compost. It’s easy to turn so the compost actually gets turned regularly which yields faster composting. We can fit our yard cart underneath so moving the newly made compost is easy too.



















