I feel like I'm having some kind of issue with my Calcium reactor setup. I've got a Masterflex with an MTC Minical and a Carbondoser. I've got the Apex keeping the pH at around 6.5. I've got a heavily stocked SPS tank that is healthy and growing but Alk is stuck at 5.5-5.8. I can't get it to go up. I've got the flow rate on the Masterflex set to 200 but it seems like no matter what I set it to, the Alk won't rise.
The other thing is, I don't see the actual media burning up at a fast rate? I'm reading accounts of people adding in more media every couple of weeks but I'm not doing that, even though I have the pH set to 6.5.
What should I be looking at?