O2 marble like farm + switch

TThe list includes:

- one O2 farm (90 x 70mm) , This is 3D print Marble-Like PLA, not real marble.

- switch connector part (used to connect other farm part, also can "open and close pad")

- now got red cover (ant can not see red color, so they will think it is black dark undergrand, but we can see though red)

- with new stable water system, can add 2 ml water on the side of farm, 2 area to add water, check the photo, it will stay same level water and ant can drink from inside.

- syringes included

Once the colony grows, this farm can be connected to more O2 farm using a "switch part," and it can be connected to as many as you like. This way, you can expand the farm as the colony gets bigger and bigger.