Is anyone controlling a reef tank using a photon?

Thinking of using a couple for lighting and pump control, just dont know if this is too large for first project

You can certainly control a pump and some lights with one Photon (along with some external components). Whether this is too large for a first project depends on your level of knowledge and experience, but there are lots of people here to help. We could offer more specific advice if you can give more details about what you’re trying to do.