Looking at buying an ApexEL. Out of the gate I want to use it to control my CO2, heaters, total control of 4 Kessil 360's and 2 EcoTech MP40QD's. I've read a bunch, but not sure I have a total grasp on the different things I'll need. I think I need:
1 VDM to give me 4 0-10v ports for the Kessils
1 VDM to give me 2 more ports for the MP40's
Not sure what cables I need to connect the Kessils (or how many). They will be connected to each other with cables from Kessil
Not sure what cables I need to connect the MP40's (or how many)
I don't think I'll need anything that doesn't come with the EL to control my CO2 or my heaters.
I will ultimately be changing to a sump with three separate pumps. Because I think (not sure) each VDM can only accept 4 inputs, will I have to purchase another VDM to be able to separately control each pump? (two will be pushing water through CO2 reactors so will need to adjust the output on each pump individually)
I will ultimately be using it to monitor TDS, which I think requires two probes and the PM2. Given that, and all the above, would I ultimately save money by purchasing the full unit instead of the EL?
Am I missing something? Thank you very much for your help!
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