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This Recirculating Calcium Reactor by Cleartides comes complete with pump to keep the CO2 turning over and dissolving the media within a fluidising reactor ... and works with both 120 volt/60 hertz and 220volt/50 hertz systems.

This then produces calcium and trace elements to your water keeping levels at or above Natural sea water.

With a unique reactor/ pump design, eliminates the need for a dosing supply pump.

The calcium reactors come with everything you need to get going.... well, nearly.. just need the CO2 bottle and gauges.



Also due to its pressurised design allows you to sit the reactor below the water level ... allowing the calcium reactor to sit in the cabinet while pushing the effluent back to the raised aquarium above


Calcium Reactor Kit :

Calcium Reactor, Calcium Media, Ph Port (C1000 only), Control Valve, 2 metres of 6mm Piping and Bubble Counter... (works with both 110/120 volt/60 hertz and 220/240 volt/50 hertz systems)

lf you require a PH Port fitted to the smaller reactors, please state when ordering. There is no extra charge for this.


Dimensions (mm):

Height:    450


Column:  90

  • Instructions

    1. Fill Calcium reactor with calcium/ coral sand.

    2. Fill reactor with aquarium water.

    3. Reseal lid

    4. Fit clear pvc tube to inlet. The inlet (water) is either one of the two 6mm hosetails.

    5. Run pvc tube from the CO2 bottle and gauges to Bubble counter. And then run pvc tube from bubble counter to inlet of reactor. The inlet (CO2) is one of the either two 6mm hosetails.

    7. Place Control Valve inline ('cut' PVC Tube) from outlet of reactor to aquarium/Sump.

    8. Place control valve to de-gas chamber.

    9. Suck remaining air from the reactor by means of the degas chamber valve and outlet valve.

    10. Close both control valves when all of the remaining air in the reactor is gone.

    11. Add power to pump.

    14. Open valve outlet valve slowly till you get a drip rate of one drip per second.


    13. Over a period of time, gas can build up within the reactor. Open valve on de-gasing chamber until the gas has dissipated the chamber.




    lf you have any problems with this set-up, please contact cleartides on 01529 497076 or email





    • Always keep the unit topped up rather than letting the media fully dissolve and then replacing a large amount at one time. The only real difference between one model and the next one up is the volume of media that it holds so if you run you reactor at half full you may as well have bought the next reactor down.
    • We prefer that the drip rate and bubble rates are set by measuring the dKH of the effluent from the reactor. This should be set at about 45-50 dKH which corresponds to 800 - 900 ppm of calcium. It is a simple matter therefore to set this up and then to adjust the length of time during the day that the reactor is operated until the correct calcium level is maintained in the aquarium.
    • Always try to run the reactor during the lighting period of the aquarium so that the natural increase of the pH in the tank due to photosynthesis counteracts the lowering effect of the CO2 addition.
    • The fluid above the media should be clear not cloudy.
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