618 Calcium Reactor by GEO : All cell cast acrylic construction
* Clear lid to view proper O-ring seal
* Key hole slot for lid removal
* Micro ball valve effluent control
* Eheim 1048 pump, bolted to base plate
* pH probe port in lid
* pH probe adapter included
* Auto fill bubble counter
* 10 x 9 foot print, 24" overall height
* Holds 12 pounds of media, we recommend large grain schuran type
* For reef aquariums up to 350 gallons
The world famous GEO calcium reactor!
Our reactors are fabricated using only the finest cast acrylic materials and high quality fittings. Designed with the user in mind, we feel these are by far the easiest reactors on the market to install, operate and maintain. Bottom up flow of water 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 our design.
These reactors include all of the fittings and tube required for normal installation. The user will need to supply the media, CO2 equipment and feed pump.

624 Calcium Reactor by GEO : * All cell cast acrylic construction
* Clear lid to view proper O-ring seal
* Key hole slot for lid removal
* Micro ball valve effluent control
* Pan World pump, bolted to base plate
* pH probe port in lid
* pH probe adapter included
* Auto fill bubble counter
* 9 x 12 foot print, 29" overall height
* Holds 16 pounds of media, we recommend large grain schuran type
* For Large SPS reef aquariums.
The world famous GEO calcium reactor!
Our reactors are fabricated using only the finest cast acrylic materials and high quality fittings. Designed with the user in mind, we feel these are by far the easiest reactors on the market to install, operate and maintain. Bottom up flow of water 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 our design.
These reactors include all of the fittings and tube required for normal installation. The user will need to supply the media, CO2 equipment and feed pump.

818 Calcium Reactor by GEO : * All cell cast acrylic construction
* Clear lid to view proper O-ring seal
* Key hole slot for lid removal
* Micro ball valve effluent control
* Pan World external pump, bolted to base plate
* pH probe port in lid
* pH probe adapter included
* Auto fill bubble counter
* 13 x 14 foot print, 24" overall height
* Holds 12 pounds of media, we recommend large grain schuran type
* Well suited for Large SPS reef displays or commercial holding systems
The world famous GEO calcium reactor!
Our reactors are fabricated using only the finest cast acrylic materials and high quality fittings. Designed with the user in mind, we feel these are by far the easiest reactors on the market to install, operate and maintain. Bottom up flow of water 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 our design.
These reactors include all of the fittings and tube required for normal installation. The user will need to supply the media, CO2 equipment and feed pump.

Kalkwasser Reactor by GEO : All Cell Cast acrylic construction
* Side mount pump
* Easy fill top for kalk replacement
* Drain valve for testing and filling
* Dependable Maxi-Jet stir pump
* Use with your top off system to replace evaporated aquarium water with kalkwasser
* 7x12 foot print, 22" tall
The world famous GEO kalkwasser reactor!
Our kalk reactors are fabricated using only the finest cast acrylic materials and high quality fittings.
Designed with the user in mind, we feel these are by far the easiest reactors on the market to install, operate and maintain. Easy fill fitting on the lid for adding kalkwasser as needed. You only need to remove the lid for cleaning the reactor.
Drain valve allows you to lower water level in the reactor when adding fresh kalkwasser. You simply remove water from the reactor into a container of kalkwasser, stir it into slurry and pour it back into the reactor through the easy fill opening.
The dependable Maxi Jet stir pump mixes the powder in the chamber; there is no chance of powder exiting the reactor, even if the dosing is pumping water through the reactor as the pump is mixing.

1218 Calcium Reactor by GEO : * All cell cast acrylic construction
* Clear lid to view proper O-ring seal
* Key hole slot for lid removal
* Micro ball valve effluent control
* Pan World 55 external pump, bolted to base plate
* pH probe port in lid
* pH probe adapter included
* Auto fill bubble counter
* 18 x 18 foot print, 24" overall height
* Holds 50 pounds of media, we recommend large grain schuran type
* For reef aquariums over 1000 gallons
The world famous GEO calcium reactor!
Our reactors are fabricated using only the finest cast acrylic materials and high quality fittings. Designed with the user in mind, we feel these are by far the easiest reactors on the market to install, operate and maintain. Bottom up flow of water 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 our design.
These reactors include all of the fittings and tube required for normal installation. The user will need to supply the media, CO2 equipment and feed pump.