Remember you can use 12V DC pumps (submersible or peristaltic) and switch them with l293D or uln2803a, and thus not using a full ac adapter, socket and the whole enchilada.Gotcha! If definitely be interested in learning more about switching the PWM profiles in the future. I'd hate to give up a few equipment slots, especially for bulky power supply plugs that typically occupy the space of 2 plugs.
My recent 3d printed enclosures for all these units are very flexible. I use barrel connectors on the dosing pump enclosure which i can directly hook up to a reef-pi controller via male-male barrel jack connector or via a 12V dc wallwart which is hooked to an AC outlet.