Been trying to figure out if feeder blocks are strictly nessecary for going away on vacation or if just leting the fish go without is healthier. I'm going on vacation for 4 days so is a block even needed? I've got 4 undersized platies (due to a friend's breeding mishap) all about the size of neon tetras, as well as a panda cory. On a side note, even though I don't have any (yet) what about feeding fry on vacation? Would a fish sitter be the best solution?