dosing question

I have a Red Sea 659 S Max system. I recently purchased a second doser 4 that I am trying to get to connect. Has anyone successfully connected 2 doser 4's? I get a IP address, firmware update, it prompts for schedule (skip), appears to connect and grays out. Any assistance is appreciated...

For the last year I've been dosing B-Ionic 2 part using a DOS and a Trident, however both part 1 and part 2 were set to trigger off the ALK reading so they dosed the same. Lately, my CA has been rising. It used to sit at a steady 460 and now it's creeped up to 532. My ALK is sitting at 9.7 so...

I have a 13.5 gallon evo and I have some corals tanks been up for about 5 months now I’m wanting to dose calcium and alkaline right now my calcium is 320 and alkalinity is 161.1 ppm how is my alkalinity? I know my calcium is low I’m wanting a target of around 400-420. I have brightwell code A...