Which Calcium Reactor for my system?

[DopeCantWin]

I have a 90 gallon with quite a bit of SPS. It is lowering the Alkalinity too fast for my Kalk Reactor to keep up. I've been increasing rates and amount of Kalk in the reactor, but it has only edged it up to 7dkh. I have the tools to do two part dosing, but that didn't work out well for me in the past and I'd like to do something more consistent. My guess is I need a smallish Calcium Reactor, what would you recommend?

 

[reefnut2012]

I was able to maintain a 300 gal SPS tank a few yrs back with nothing but Kalk as top off. When the SPS load started to become difficult to maintain. I simply added a fan over the sump to increase evaporation and the amount of top off/kalk almost doubled. The PH swings were barely noticeable.

 

[DopeCantWin]

I was able to maintain a 300 gal SPS tank a few yrs back with nothing but Kalk as top off. When the SPS load started to become difficult to maintain. I simply added a fan over the sump to increase evaporation and the amount of top off/kalk almost doubled. The PH swings were barely noticeable.

That's one of the things I'm trying. I won't be using a fan, as I'm trying to raise the temperature, but a Protein Skimmer set to skim very wet. I'm using LEDs, and supposedly the optimal temperature is around 84. My temperature with no fan fluctuates 79-81. I didn't have great results when it was just set at a straight 79 all day.

 

[Dripley]

Vortex