I've tried and tried, but my cherries just won't let me pamper them. I have two remaining of an order of 8 that I received from AZ Gardens
and of course the 12 I ordered from this site are all alive and growing very quickly.
I've given them flake food, spirulina sticks, zucchini, yams, spinache, cucumber, Cyclop-Eeze, and other bottom tablet foods. They just don't seem to care and go on grazing on what ever tiny things they are finding in the tank. Granted this is a very established tank, but I thought they'd at least enjoy a treat. Not worried about them, just find it funny is all.
With me it's the other species that just won't have it 
I think they might have to get used to what you feed them.