After several days I was able to troubleshoot the timing issues talking with the Arduino micro-controller from my computer. So I started putting together the pieces. I'll be using freebasic to control everything and log data. C code on the Arduino.
Used a 12v power supply with step-down module to 5v for controller. 12v good for Peristaltic dosing pumps.
I'll of course will seal the AC hot wires with some liquid latex. add some silicon around the screw terminals to the relays since they get AC hot switched wires.
So far only have 5 outlets connected, but will add another outlet bar for more controlling options. I also have 4 more relays on the way.
Plans include topoff, 3rd pump controller (for night mode), skimmer, heater, chiller, Dosing, Dosing 2.
Analog inputs Temp, PH, PH2 (Kalk, Calc Reactor), Water Sensor (Leak) and ORP
Digital inputs, top off level switch
I have a battery backup with car battery to give me 100 Amp hours backup, this should last 20+ hours with only one 10 small 10 Watt pump running on and off.
Once I get the code cleaned up for the arduino, will post it. The basic code will be somewhat lengthy so will provide it as a download. All the work will be done in basic via laptop running Windows, arduino only used to read / write data and turn things on/off, plus a power outage mode.
Any input would be appreciated, and questions welcomed...