What are the MUST HAVES for equipment?

[gregzz4]

I'm using a DA RKE with 3 power bars
Although I was against having all the equipment tied into one system, I'm loving all the automation and the pH probe is a big plus for me

Auto shutoff on the RO drum is piece of mind

My NSW mixing tank is beside the QT for pumping and has a drain tap over the sump. Makes WCs very quick and easy

If you use socks, lots of spares for washing is nice