I am no expert by any means.
When I set mine up with a maxi jet 1200, I started out with a slow flow. You don't really need a lot of flow to feed a calcium reactor. If you want to maintain your effluent at 35ml/min, your source water should be able to feed atleast that much. If not, just open up the valve more on your maxi jet's feed line; or close the valve on the output end. On mine, I have enough feed water to go up to 120mL/min. But I am using effluent flow valve to restrict to 50ml/min. I think too much source water will cause high pressure to a calcium reactor unit.
You want to start slow. Get your effluent flow stable before turn on the Co2.
It is actually pretty easy once you start hooking and running it.