I'm going on vacation for a week and will not be able to feed my fish. I have 5 yellow labs and an ice blue cichlid. Will they be fine with a week without food? Also I have a yellow lab holding and I plan on stripping her before I leave (at that time she will have being holding the fry for 3 weeks). Will the fry be okay with out food for a week? I can put some large sinking cichlid pellets that they can slowly nibble off of. Do those 7 day fish feeder block things work?