For indoor gardens you may use flower pots.
Use a large container, approximately twice the diameter of the plant.
Before planting the cactus, check for infected roots and cut them off.
Roots of these plants are most vulnerable to diseases.
Do not worry even if you have to cut some good roots or the plant is left with only few roots, since it has developed some of the best survival tactics.
Remember to use only sterile tools while handling infected plants.
If necessary, change the soil. If there are some wounds or cuts on the platyclades (the stem-cum-leaf), leave them for healing in the sun.
They have a natural quality of fending for themselves.