Calcium probe question

Gareth elliott

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Ok background first have a 20 gallon mixed reef. Currently using 2 part solution that I test ca and alk every 2 days. With alk and ca dosed in equal amounts.

Was reading up on some either released or upcoming continual alkalinity tests. I also saw the price on these lol.

So my question is using something like an apogee Ca+ ion probe in a stable system accomplish a similar goal at less cost and significantly less labor no refilling regent and ro water.

My theory is if your tank is stable and using a ratio of one to the other. That as the rate of consumption is increased in Ca+ that alk consumption will increase at the previously measured ratio.

And if this holds true could one use this method to reduce regular alkalinity testing to semi regular testing say 1 week or 1 month apart to readjust for any fluctuations in the ratio of usage?

Asking before I start setting aside for a probe and chip as still a hefty investment. But would give peace of mind while away from my tank for extended period of times.
 
Calcium probes are not likely ready for the sorts of variable seawater that aquaria have. They are very sensitive to other factors (salinity, etc.).

What they measure is effectively the "activity" of calcium ions in the water, which is far lower than the concentration in seawater. To correct for that, you'd need to somehow relate the concentration to the activity, and that depends on these other factors which can vary from tank to tank.

AWT (Aquamedic) uses them when you send in samples and provides what they incorrectly call "ionic calcium", but there's not really much a reefer can do with such information.
 
Calcium probes are not likely ready for the sorts of variable seawater that aquaria have. They are very sensitive to other factors (salinity, etc.).

What they measure is effectively the "activity" of calcium ions in the water, which is far lower than the concentration in seawater. To correct for that, you'd need to somehow relate the concentration to the activity, and that depends on these other factors which can vary from tank to tank.

AWT (Aquamedic) uses them when you send in samples and provides what they incorrectly call "ionic calcium", but there's not really much a reefer can do with such information.

Thank you,
Will give me a larger budget when jason fox visits my lfs on saturday lol.
 
AWT (Aquamedic) uses them when you send in samples and provides what they incorrectly call "ionic calcium", but there's not really much a reefer can do with such information.

LOL, I've ignored that number on the results of several samples I've sent to AWT for exactly that reason - I have no idea what to do with the data.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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