Discus setup... hope will work !

[fietsenrex]

Well.. with something like a reef-PI you don’t want to fiddle with the juwel controller.
Just grab some db139 (if I recall correctly) in a to220 housing, slam on a heatsink and use the 5v PWM from the reef-pi to control the lights

Looks like some components are “missing” to upgrade it to the spectrum, but that is only the hardware side..