Vole Hall

Tanks measuring 150x50x50 cm long, wide and high and bigger are suitable, but you can build the enclosure yourself from plexiglass and/or wood. In that case, it needs to be sealed with expoxy resin or other waterproof paints. I painted the bottom and lowers sides brown and the upper sides green so that the paint matched the setup.

Since voles love moist earth, you need to prevent water from pooling at the bottom of the enclosure. A layer each of gravel - expandec clay - soil/coconut fibre bedding from the bottom up works well in my experience. The gravel and expanded clay will absorb any surplus of water. Add layers of soil and coconut fibre bedding until the substrate is 30 cm high. Bird seeds or unfertilized grass seeds can be added to the last layer.

The finished enclosure

The enclosure is made for species that don't climb very well. If you want to add a small meadow to your enclosure, get a sod from outside and let it take root before you put the animals in, the sod will survive better than grass you sowed in the substrate. Sowed grass is a good idea for enrichment and the voles will use it for food as well as for bedding - hay can't be offered since it would mold quickly.
Reed voles love to bathe and must have a bowl filled with water. It should stand on some bricks so that the voles cannot dig under it and get crushed to death by accident. Choose a bowl that can be taken out of the enclosure and cleaned easily, the voles will use it as a toilet and will carry soil into the water.
Wooden furniture usually molds, but you can try to use branches and roots that are well dried (cut more than one year) and have as little contact with the substrate as possible. Check for mold regularly.
Stones and furniture made from clay, ceramic and terracotta are well suited.

The Vole Hall can be used as an enclosure for reed voles and, if you add some more climbing toys, for bank voles.
It doesn't require much care, since the soil will keep itself clean to some extent. You can add springtails and tropical or native woodlice/pillbugs, they will feed on faeces and plant matter as well as mold spores. If you want to add plants, remember to keep the substrate moist.

Translation
Jedediah