Could a dead snail be a small source of ammonia, say 0.2? Because I originally had 5 bumble bee snails, but I've only seen 4 in the past couple weeks. I assume the last one is dead somewhere where I cant see it and that it may because the cause of the ammonia in my system. Any suggestions, should I just let the bacteria take care of the ammonia or rip things apart trying to find this snail?