This is because:
* Acrylic is generally preferred for smaller tanks due to its lighter weight and better scratch resistance.
* However, some customers may specifically request a glass tank for their biocube due to personal preference or specific needs.
Therefore, it's not safe to assume all 29 gallon biocube tanks are acrylic. If you're unsure about the material of a specific tank, it's best to check with the seller or manufacturer.