ONE BAYJF Acrylic Aquarium Fish Acclimation Box, Orange, with Removable Divider

ONE BAYJF Acrylic Acclimation Box is a ready-to-use aquarium box for temporarily isolating, quarantining, and acclimating fish, made from approximately 0.217-inch (5.51 mm) transparent acrylic.

• Optical-grade clear acrylic — lets you observe fish inside the box.
• Two hanging hooks — attach the box to a tank edge; suitable for rimless tanks and frames up to 15 mm thick.
• Removable divider — create one or two isolation spaces.
• Water-flow slits and a widened bottom gap — help keep water moving and reduce buildup of food and waste.
• 7.87 x 6.69 x 7.87 inches (20 x 17 x 20 cm), with a 4.2 x 2.4-inch (10.7 x 6.1 cm) feeding opening — gives you the box and opening dimensions for planning aquarium placement and feeding.

When fish need a separate space for quarantine, acclimation, or temporary isolation, a box that hangs inside the aquarium keeps them in the tank environment while allowing you to monitor them. ONE BAYJF is made for aquariums of 20 gallons (75.7 L) or more and is also intended for reef coral quarantine. Its feeding opening lets you feed fish without disturbing them, an approach designed to ease anxiety during quarantine.

What can the ONE BAYJF box be used for?

It provides temporary shelter for fish isolation, quarantine, and acclimation in freshwater or saltwater aquariums. The clear acrylic makes fish activity visible, while smooth, safe edges are designed to help protect fish as they swim. The acrylic does not leach phosphate (PO4) and is suitable for extended use in either type of water.

• Transparent optical-grade acrylic with orange color matching.
• Suitable for temporary fish separation and reef coral quarantine.

Will it fit my aquarium?

The box measures 7.87 x 6.69 x 7.87 inches (20 x 17 x 20 cm) and is intended for tanks of at least 20 gallons (75.7 L). Two hooks hang over the aquarium edge; they suit rimless tanks and frames no thicker than 15 mm. Compare the box dimensions and your tank’s edge thickness when choosing a placement.

• Ready to use out of the box; no assembly is required.
• Measure the available aquarium area before positioning the box.

How does the divider and water flow work?

A detachable partition adjusts the interior between one and two isolation spaces. A 0.1-inch (2.54 mm) slit around the box allows water flow, and a 0.14-inch (3.56 mm) widening at the bottom helps keep food residue and fish feces from dirtying the box. The rectangular top opening measures 4.2 x 2.4 inches (10.7 x 6.1 cm) and provides access for feeding without disturbing the fish.

• Adjust the compartment count by removing or using the partition.
• Use the top opening to feed fish while they remain isolated.

This box suits aquarium keepers who need a visible, temporary space for fish isolation, quarantine, or acclimation, including in saltwater setups. Its hanging hooks, adjustable divider, and feeding access make it a practical choice for temporary separation rather than a permanent tank partition. It is sized for aquariums of 20 gallons or more and arrives ready to use without assembly.