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Geo Calcium Reactors
Geo CR818 Calcium Reactor
The world famous GEO Calcium Reactor!

Geo reactors are made in the USA in Ohio and fabricated using only the finest cast acrylic materials and quality fittings. Geo calcium and kalkwasser reactors like all GEO products are designed with the user in mind. The bottom up flow deisgn in the GEO calcium reactor captures free CO2 and draws it back into the pump. This means less gas in the reactor and less gas in the effluent. There is no need for a second single pass chamber with the GEO design.

The GEO calcium reactor line include all of the fittings and tube required for normal installation. The user will need to supply the media, CO2 equipment and feed pump of choice.

Geo CR818 Calcium Reactor

GEO CR818 Calcium Reactor

The CR818 will hold 24 pounds of large grain media and is well suited for large SPS reef displays and commercial holding systems.

  • 8" diameter reaction chamber
  • All cell cast acrylic construction
  • ½” thick lid, 3/8" thick flange and base
  • Silicone o-ring
  • Key hole slot for lid removal
  • Full access to the reaction chamber (small diameter union tops do not provide this, making maintenance a chore)
  • Micro ball valve effluent control
  •  External pump Pan World PX 40, bolts to base plate
  • pH probe port in lid
  • pH probe adapter included
  • Auto fill bubble counter
  • 13 x 13 foot print, 24" overall height


Geo CR624




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