|Bumblez (left), and Oakki (right)|
I've been trying out numerous foods lately and the first week they ate at least twice a day which varied and possibly consisted of some nori, NLS (New Life Spectrum pellets for Goldfish), sliced ginger, Hikari frozen bloodworms, plain cooked white rice, and Hikari Lionhead pellets (just playing with different food options). The second week since I had a fish sitter they were being fed once a day sharing a 1/4 Tsp of the NLS. The 3rd week I got a fish feeder which dispersed NLS gradually over 6 hours, then a few Hikari Lionhead pellets over the following 6 hours, and then the feeding repeated again throughout 24 hours so they're almost constantly able to graze for tid bits of food (which I've read is more natural for ranchu/fancy goldfish) although it's not really going over the amount of food they generally consume in a day.
Having the feeder does seem to make them more active and curious about finding food so I'll probably continue with that regime while also giving them frozen bloodworms 1-2 times a week along with it, and perhaps a little piece nori once a week (Bumblez seems to enjoy that, while Oakki seems to enjoy the daily pellets of Hikari Lionhead).