Calcium reactors & kalkwasser reactors dose vital calcium or kalkwasser into your reef tank slowly and properly, monitor your calcium levels to replenish as needed, and prevent problems like calcium precipitation, which clogs drip lines and irritates corals. Phosphate reactors take any fine grained chemical media (not just phosphate removers) and suspend them in a reaction chamber for optimal surface area & contact time, providing the best chemical filtration possible.

For CO2 reactors, check out our CO2 systems.



Two Little Fishies KW Reactor 300 Price: $58.49 Sale price: $55.09	MR1 Media Reactor - Up to 250 Gallons Marine and 500 Gallons Freshwater $69.99	MR1 Complete Media Reactor up to 250 Gal. SW and 500 Gal. FW w/ Pump and Tubing $89.00	MR1 Monster Media Reactor - Up to 600 Gal. Marine and 1200 Gal. Freshwater $179.99



MR1 XL Media Reactor - Up to 375 Gal. Marine and 750 Gal. Freshwater $99.99	MR1 Shorty Media Reactor - Up to 100 Gal. Marine and 200 Gal. Freshwater $59.99	Phosphate Reactor Price: $58.49 Sale price: $44.69	PhosBan Phosphate Reactor 150 Price: $39.59 Sale price: $34.09



Professional Calcium Reactor with Pump $399.99	Simplicity Fluidized Bed Chemical Reactor (Magnavore) Price: $28.79 Sale price: $23.49	Calcium Reactor - Up to 500 gal. Price: $152.99 Sale price: $125.39	PhosBan Phosphate Reactor 150 O-Ring Price: $1.19 Sale price: $0.99



PhosBan Phosphate Reactor 150 Foam Disks Price: $2.39 Sale price: $1.59	Poly Reactor Multi Media Reator Price: $35.99 Sale price: $32.29	PhosBan Aquarium Phosphate Reactor 550 $53.99	PhosBan Reactor 500 Replacement O-rings Price: $2.19 Sale price: $1.29



PhosBan 550 Replacement Foam Disks - 2 pk. Price: $2.89 Sale price: $2.39	Two Little Fishies PhosBan Reactor NPX Bioplastic Screen 2 pk. Price: $2.19 Sale price: $1.99	Two Little Fishies PhosBan Reactor Extension Kit Price: $2.89 Sale price: $2.39	Next Reef MR1 Replacement Sponges - 2 pk Price: $6.29 Sale price: $5.79



Next Reef MR1 Replacement O-Ring - 1 pk Price: $6.29 Sale price: $5.79