The Robo-Tank DIY aquarium controller is a high quality reef-pi hardware solution. Fully customizable aquarium controller for your saltwater, freshwater or reef tank. DIY or Plug and Play kits available, automate your reef tank keeping your fishy friends safe and happy for years to come.
I would say go with the Robo-Tank, I wished I went that route instead of trying to source my own parts probably made me spend way more than I anticipated along with all the troubleshooting that went along with it.
As someone who has built multiple ReefPi setups, complete DIY, Hats etc, I now run two RoboTanks and wish it was available from day 1. Solid setup with ridiculous expandability.