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I've done both calcium reactors and 2/3 part. Once dialed in a calcium reactor is much easier to operate.

Yes

You can tune them much finer in regards to bubble rate. I don't run a pH probe because of this.

Both

I just don't run my CaRx when my lights are off. This way it affect the pH less. Typically your corals are not consuming the Ca or Alk when the lights are off.

So, the way I have mine controlled, the CaRx peristaltic pump and CO2 are only allowed to be on during the lighting period. But my apex will turn off both if the dkH is over 8.

I actually have these parker metering valves that are much better than the swagelok. I don't think that is what I gave Boun though. hahaha

I've been doing it like this for a few years now. If my numbers ever look very off I switch to manual until I can fix it.

For regulators, a good dual stage is a better choice. I think I have a bunch of parts still if you need any to build one.

Just changed my schedule to do 2 tests in the middle of the day and skip the midnight test. This will help lessen my alk swing as my CaRx is controlled by the trident.

If you run a pH probe it should be in the carx. I have never bothered with a probe, I just run extra CO2.

I believe pushing is better because of a pressure build up if you pull. Some reactors are meant to run under some pressure, but most now are not.

It should be fine.

I am not planning on going to the swap, I feel like I can be completely impartial in my voting if you want another person.

I used emarco solely on my current tank. It does take some patience, however it sets faster than you expect.

Yeah I don't care about b and c. With a carx, my ca and mg do not drift independently of my alk. All I care about is the alk.

But does that mater if I don't ever want to use it?

Thoughts on just running and testing reagent A. Will this be a problem?

How do you do this? I want to check alk frequently but only when the lights are on. I could care less about b/c. If I could only test Alk that would be great.

No, I haven't been to any event since starting back up. Life has been too busy.