My setup with those emitters works like a charm for 3 years. There is a ceramic filter, a solenoid valve (normally open), a flow restrictor (not necessary), a pressure restrictor, and an emitter with pressure compensation. No maintenance except cleaning the filter once a year. The 1/4 tube with fresh water is inside the 1" pipe from the aquarium (10 m). It's a pipe-in-pipe heat exchanger. Pretty effective at low flow.
On the right - return pipe with foam isolation.