Im leaving for 3-4 days...i have a 10 gallon with 2 corys 4 ghost shrimp 1 hillstream loach 3 mollys a bunch of plants and a snail...i have a smaller 2.5 gallon with about 8-12 week old molly fry. Will they be alright for 4 days unfed, or what else can i do? 
