Waterbox Cube 20 Freshwater Algae Scrapers It is usually suitable for

It is usually suitable for peaceful reef communities

caves and overhangs so subordinate fish can retreat

Reef Safe:Reef Safe with CautionGenerally safe with corals and most sessile invertebrates

You can turn a PRO into a blue and vice Versa

Waterbox Cube 20 Freshwater Algae Scrapers It is usually suitable forWaterbox Cube 20 20 GallonsAll models include aquarium, return pump, and filtration media. Ideal for both saltwater and freshwater. Performance in a Small SizeThe CUBE was designed so you can keep more in your aquarium with less. Available from 10 to 20 gallons, the CUBE delivers an aquatic environment for novice and professional aquarium keepers. Full Glass FiltrationThe CUBE filtration is designed to be used with freshwater and saltwater aquariums.