I have run a calcium reactor for years, you really just need to go for it.
Once setup, you’ll be happy you did.
That said, I don’t necessarily agree with some of the comments made in this thread.
In general, you want to target a CaRx chamber ph of about 6.6. This is one setting, I would not adjust up/down too much.
I target a chamber ph of 6.6, this will give you a little buffer when your ph probe floats out of range. These ph probes are not 100% accurate and the ph readings will float on you, no question about it, it just happens.
Recalibrating the ph probe on a regular schedule is pretty much a must.
Basically, adjust the co2 bubble count to give you a chamber ph of ~6.6.
Double check the instructions on the media you plan to use, they typically have a suggested target ph melting range.
Some brands can recommend slight different ranges.
If you go too low with the chamber ph, your media can get mushy and start clumping together, you want to try and avoid that.
A ph controller makes this entire process much easier, I run mine off my apex.
I have co2 bubble set to about 1 bubble per 2 seconds but this will vary depending on your system.
I would start at a co2 bubble count at 1 bubble per ~3 seconds and adjust chamber ph from there. Don’t rush this process.
Keep in mind , CaRX chamber ph and co2 generally relate to bubble count.
The water exiting the CaRX chamber relates to drip rate.
I’d start your chamber output (drip rate) at about 1 drip per second, adjust from there.
Your chamber output (drips per second) is how I would recommend adjusting alkalinity.
Make sure to have a good needle valve on your chamber output, it will make your life a lot easier on adjusting the CaRX chamber output. I wouldn’t skimp on this, the cheap plastic ones are not very accurate and can be difficult to fine tune.
Almost forgot to mention, check your alk daily.
I would also recommend watching some setup videos, I’m sure bulk reef supply has one.
Since you’re new at this, I tried to keep this as simple as I could. Hope this helps!