This is a special edition of Por Armor "Test Tube Array Formicarium. There is a completely unrestricted view to the inside of the port that holds the test tubes in place, removable black-out plastic covers, test tube inserts and water refillable.
Por Amor added a glass window, made it fixed to 3 tubes only; it's thinner, streamlined the design and can be connected in series side to side, creating an easy to expand array setup.
Each tube in your setup can have a specific function. For example, pair the following tree tubes; one for the main chamber with a standard short insert and a long cotton keeper to hold the most water, subsequent use one of the included array test tubes with more extended insert and refillable water hole / and last a long plain plastic insert (used in the culture tube design), to create a dry area and perhaps apply a heating cable. The described test tube setup gives a colony of ants a gradient from wet to dry and heat to only certain areas while everything is in clear view.
Each test tube has a watering hole at the back, allowing you to control the humidity levels on each tube, you can choose where to have more or less humidity as needed. We suggest always having at least one dry tube in the set-up, so your colony has a humidity gradient to choose from.
Due to the hole on the back, test tubes are not able to hold full level water capacity compared to a traditional test tube, water would flood into the insert area if filled too much, this is due to the lack of negative pressure, we recommend using crushed vermiculite or perlite to fill the water reservoir space, therefore increasing its capacity to hold more water and for longer periods of time, each tube comes already prefilled with perlite and cotton in place, photos show examples of this, when injecting water please do so slowly and carefully observing for saturation on the cotton, the goal is to add enough water but avoid flooding the insert underside.