geo 618 calcium reactor with remag

[Vu337]

Can someone please help, i have a geo 618 calcium reactor and i want to use remag with it who much remag do i use when filling up the reactor with reborn and remag?

 

[Randy Holmes-Farley]

The manufacturer (TLF) and the general rule is about 10%, but you may need to adjust to your tank magnesium needs relative to calcium:

Directions: Rinse ReMag briefly in tap water. Add ReMag to a calcium reactor at a ratio of 10% ReMag by volume to 90% ReBorn (or other aragonite media for calcium reactors) to replenish the calcium, magnesium, strontium and carbonate alkalinity that corals and coralline algae utilize to form their skeletons. Used as directed, ReMag easily maintains the ideal magnesium concentration of 1280 - 1300 mg/l in marine aquariums at a salinity of 1.025 - 1.026. If the magnesium concentration is lower than ideal, increase it first by using Two Little Fishies Magnesium Concentrate or Magnesium Pronto. After achieving a level of about 1300 mg/l, use ReMag in a calcium reactor to maintain the concentration. The coarse size of ReMag (5 - 10 mm) allows for unrestricted water flow and easy diffusion of carbon dioxide, for maximum efficiency and easy maintenance of the reactor. ReMag is soluble at a pH of 6.5. Even at typical aquarium pH values it is slightly soluble, so ReMag can be used in a sandbed to help maintain the magnesium level in the water. ReMag does not add chloride or sulfate ions that disturb the ionic balance of the water. Top off the reactor with more ReMag as needed. If ReMag does not maintain the magnesium concentration, do not reduce the pH inside the calcium reactor. Simply increase the ratio of ReMag:Reborn, but do not exceed 25% ReMag by volume as it could raise the alkalinity too high.

 

[Vu337]

Do I need to place remag in the bottom or top or it doesn’t matter? I also going use a carbon doser regulator should I use the adjustable needle vale or the one that’s not adjustable on the geo 618? Thanks again for your quick reply!

 

[Randy Holmes-Farley]

Do I need to place remag in the bottom or top or it doesn’t matter? I also going use a carbon doser regulator should I use the adjustable needle vale or the one that’s not adjustable on the geo 618? Thanks again for your quick reply!

I'd mix it through, since more of what is on the side where the CO2 enters will dissolve .

I'm not sure what you mean by a carbon doser regulator. You mean a CO2 regulator?

 

[Vu337]

I mean the brand “carbon doser” it’s electronic

 

[Randy Holmes-Farley]

I've never used a CaCO3/CO2 reactor, but I expect that if I did, I'd use it with a controller that was based on a pH measurement.

Needle valves work perfectly well and are a fine way to go, but I think a controller is better.

If you use a controller, I'm not sure that a needle valve is still useful.