Two Little Fishies PhosBan Reactor 550 Butterflyfish provides a reef-safe range of

provides a reef-safe range of color temperatures that enable all corals to flourish

Replacing a worn out ORP probe

Keep away from children

Solid Carbon Block removes Chlorine and other Volatile Organic Compounds effectively up to 3750 Gallons at 2 PPM Cl2

It's an economical alternative to a calcium reactor

Two Little Fishies PhosBan Reactor 550 Butterflyfish provides a reef-safe range ofThe PhosBan Reactor 550 is designed with the upflow principle to achieve the most efficient use of PhosBan or other chemical filter media. By pushing water from the bottom upward through a dispersion plate, it forces an even distribution of water through the media, and prevents channeling. It can be mounted hanging on the back of the aquarium or below the aquarium. Includes ball valve for regulating flow, and flexible connection fittings that rotate