Years ago on reefcentral there was a guy who was trying to get an NPS dominated system going - and he had quite a bit of success. Part of the problem for him was he needed to constantly add food through a dosing pump to feed the tank throughout the day.
He mixed a variety of frozen and live foods (planktons) and added some water to it to make a slurry. This was kept in a container on a stir plate which was then placed inside of one of those tiny dorm room refrigerators. He cut holes into the refrigerator for a 1” pipe to run through it. The pipe was the return line out of his sump. The dosing pump, which also was in the refrigerator, dosed directly into this pipe.
Everything was kept in the refrigerator so as to avoid any spoilage from food sitting in the dosing pump line. If memory serves me right, I believe he could keep thawed food for about a week in the refrigerator before it would start to turn bad.
I’ll see if I can track down his old build thread on reefcentral.