Would a 30cm x 30cm x 30 cm be big enough for an adult nephrusus, and how many could i keep in it. also could i just use playground sand from bunnings?
i house my adult pair in a 40cm long enclosure.. from what I and most other people have experienced,
a "red desert sand" is more suitable for its ability to hold together. Allowing them to dig burrows in it.
A 2 foot aquarium or similar sized enclosure will comfortably house up to a trio of Knobtails. And, for the record, they are called NEPHRURUS, not 'Nephrusus'.