I have been using Neptune apex for over a year and am heavily invested in their lineup. I also have access to some reseller discounts for Neptune so I use Neptune for my service customers locally so I guess you could say I’m all Neptune lol. But I have never enjoyed the coding and custom writing to get what I want out of it. I have had to make some fairly complex code setups to get various things to do what I want and it’s caused me problems before and on occasion problems for service customers. In addition I have some pretty horrendous clutter. I have modules upon modules upon modules lol. So I’m considering a change. I’m trying to come up with what I need if I switched to GHL. Here is what I currently have with apex: Apex 2016 2x energy bar (for a total of 3) 2x ATK top off packages and modules 3x DOS pump units (6 heads total) Breakout box Pm1 with temp and ph probe (for QT) KH monitor Here is what I think I’d need. But I’m guessing there are splitters and extension cables and modules I’m missing? KH director with slave doser Additional GHL doser slave unit 2x GHL Maxi Units ProfiLux 4 ultimate 2x powerbar 5.1 (for a total of 3) Extra Temp sensor Extra Ph sensor 6 Level sensors, optical Replacement top off pumps since I can’t use the Neptune pmups For 2 extra sensor (pH + Temp) will need https://store.aquariumcomputer.com/...o=p28_plm-ph-redox-digtemp-sensor-inputs.html For 2 extra level sensor will need https://store.aquariumcomputer.com/en/product_info.php?info=p27_plm-4level-sensor-inputs.html To connect 2 level sensor on a level port need https://store.aquariumcomputer.com/...nfo=p65_splitter-cable-for-level-sensors.html (get 3) I have 3 dosing pumps for dosing stuff, and 3 for auto water change. I would use pumps for my two ATOs. I do 12000ml daily AWC. And my alk calc etc dosing is about 150ml a day.