I have done this before also, but with two reservoirs instead of one. One had liquid nutes (shame on me). Both had aquarium pumps circulating AND aerating the water (think waterfalls).
It is hard to find a timer that supports both day of the week programming (to schedule nutes), and one second...
I'm happy to resurrect this thread as it is purely about the test of time. The last post (and some others high up) really nailed it in my opinion. Cure, then evacuate with nitrogen/co2 the lazy way knowing they are denser than air. This is cheap, and effective, and I look forward to trying it...