Last tuesday I gave the fish tank a really thorough cleaning because when I came home, I noticed the bottom was littered with old fish flakes that one of my parents had left to sit on the top of his water for about a full day. Just yesterday I noticed my new little fishie Uno is turning a light shade of red around his face and gill area and he also has what appears to be a very light streak of red going down the lenghth of his body! The clear tips of his fins are also a light shade of red, but only the vein looking parts are. He lives in an unfiltered tank which is about 2.75 gallons without a heater and the water in his tank is room temp. Ever since I had gotten him on the eleventh he hasnt eaten or pooped, we've tried flakes, pellets, and freeze dried brine shrimp. Uno has been his energetic self until lately I've noticed him become less and less active. Unfortunately I am in a very tight spot and can't get supplies until friday, then on sunday I have to go on a week long road trip and can't take the fish... I'm almost positive that this he's ammonia poisoned but how do I check, what do I do until Friday and how do I cure it?