Best ca reactor for nano tank?

[Picano]

I have a 20g high and a 20g long sump. Tank is SPS dominated and I'm looking for better system automation. I don't like dosers so I'm looking for a good ca reactor. Any recommendations?

 

[Waterobert]

Calcium reactors have tendency to lower ph in main tank. You need to have reactor with two chambers,however I believe that in tank of your size even two chamber calcium reactor will lower ph.

 

[Picano]

I have an algae scrubber and macro fuge on separate light timers from the display tank.

If pH goes too low, I could drip kalkwasser as well. However with the scrubber and other fuge, I doubt my pH swings too low.

Thank you for your suggestion for two chambers. However, I still need some suggestion on which brands are good for nano tanks and what you would use.

 

[CalmSeasQuest]

I run a Geo 612 on a ~50 gal system. Even with Kalk saturated ATO, a reverse lit fuge and a CO2 scrubber feeding the skimmer - pH is still a struggle. I average 7.9~8.0
Without Kalk, I'd be <7.8

Precision is also a challenge when runing a CaRx on a small system. It took me a few months to get the right combination of equipment and settings.

You can view my set setup at The End of 2-Part...

 

[ange062]

2-part is MUCH more prevalent in nano tanks, might be something to look into instead of a reactor if you get some dosing pumps to automate it.

 

[Picano]

Thanks for the info and link.

I'll think about all of it.

Auto dosing pumps is an option if I stay with the small system for longer than a year.

 

[CalmSeasQuest]

2-part is MUCH more prevalent in nano tanks, might be something to look into instead of a reactor if you get some dosing pumps to automate it.

Dosing can become difficult in very high demand smaller volume systems. In my case, my tanks contain large numbers of SPS colonies resulting in large Alk uptake. At apex, I was dosing more than 160 mL/day of 2-part (in addition to Kalk saturated ATO) to maintain levels. At those amounts, the 2-part caused significant increases in salinity which had to be manually adjusted weekly.

It has taken a great deal of patience to get the CaRx "dialed in" but now it performs much better than the prior 2-part dosing.