Nearly 3 years ago I purchased a Pacific Sun Calcfeeder Pro AC2 with degassing chamber. At the time I debated between it and the DaStaCo. Two factors led me to decide on the Calcfeeder; cost and elements. Cost is pretty straight forward, it was less. At the time I also saw the two reactors potentially doing the same thing, so why pay more? Then there's the fact that the DaStaCo effluent is calcium and alk only. When dissolving coral skeleton or aragonite you get the benefit of some magnesium and other elements like strontium, etc. That was the most important factor for me at the time. My thought was, what the coral takes in it most likely needs, so it's best to provide that to my corals through effluent. I decided on the Calcfeeder and it was a love hate relationship. A couple weeks ago my Calcfeeder had a problem which I had spent a few days working on. Tomasz at PacSun helped me out, but not well enough and not fast enough. It wasn't working properly yet and I didn't want to follow his suggestion as a next step. It was time for a divorce from PacSun.
Enter the DaStaCo. I ordered it from Unique Corals and they shipped it with a bucket of media to me overnight air freight for $50. Unique offers free standard shipping and I just paid the difference. Joe at Unique was extremely helpful, responding to my voicemail from his vacation and texting me at night over the weekend. Donna at Unique was awesome and found a cost effective method of overnighting me the package on Delta air freight. UPS wanted something like $300. Ridiculous.
The truth is this CaRx was so simple to setup that rinsing the media and cutting the tubing took the longest of any step. I had it up and running in no time. You're probably wondering, why the change? What didn't you like about the Calcfeeder? What kind of problems did you have? I'll get into all of that, every issue, over time. Subscribe and stay tuned, there's a lot to it. First I'll talk about the DaStaCo.
The DaStaCo reactor has 3 chambers. The co2 chamber is small and attached to the main media chamber. An Eheim pump attached to the co2 chamber circulates the water between the first media chamber and the co2 chamber. There is a float switch at the bottom of the co2 chamber that tells the controller when to add more co2. I think the DaStaCo could use the same type of sensor the Calcfeeder uses with better results because of the clean media. I was told the DaStaCo media doesn't break down in the same way as aragonite so there should be no mushy mess with cloudy water to block the sensor. The float switch seems to work just as well so I suppose the other sensor wouldn't be much of an improvement over it. I was told to fill the main media chamber 1/2 full with media. There's a final chamber that is like a degassing chamber. I was told to fill that 2/3 full with media, however someone in the DaStaCo Facebook group told me to fill it higher than that.
All it takes to get the flow working correctly in this reactor is to set the co2 output to fill the chamber within a large time window and have just enough co2 flow continuously enter that chamber when the solenoid is on. Then you set the alk/calcium dial to your aquarium's need and check the alk level in the DT regularly to make sure you're getting the right amount of effluent. The controller automatically vents to release gasses that aren't co2 so the reactor is working as efficiently as possible. The number of vent occurrences per day should be half the number on the alk dial.
I set the alk level on the controller to 2 and the alk level stayed around 9, then slowly rose toward 10. I dialed it back to 1.5 an it's stayed steady around 9 since. I had been concerned that the aquarium's PH level would drop because of the low PH in the reactor. So far I've found that my PH level has risen. The Calcfeeder had lowered it more. I had been doing things to help raise the PH like kalk in my ATO, keeping a window open in the basement for better co2 exchange and I attached a reactor with lime media to the air intake of my skimmer. All of those things do help to raise the PH of the tank. I've since taken off the lime media reactor and I'm monitoring PH which is around 8.3 at peak and lowers to about 8.1 at night.
Here are a few pictures of the reactor and the fish/sump room. I'll take some more soon as well as a video of my entire setup, from the aquarium back into the fish room.