Zoo Med Laboratories AZMMAJ Mopani Wood Jumbo, 20 to 24-Inch Mopani Wood. Miscellaneous Aquarium Manufacturer: ZOO MED LABORATORIES INC Manufacturer part number: MA-J Zoo Med Laboratories opani Wood A beautiful two color African hardwood for aquariums or terrariums One of the hardest and densest woods available; sinks immediately in aquariums and unlike driftwood, will not rot