I have this 10 gallon with a Pearl Gourami and some neon tetras. I bought it for my little brother and I take care of everything for him. He is super attached to all the fish in there. He even has names for them. Today the heater busted and had all of this brown stuff was flowing out of it into the tank. I found 2 of the neon tetras dead and everything else doesn't look good. I just told him and showed him the heater. He is very mad at me and is telling me I didn't buy a good enough heater. What do I do?