Hi. Thanks in advance for your advice. I'm a new fish hobbyist and I'm having some trouble. I set up a new tank 12 days ago, starting with only 4 fish. The ammonia level is up to 2.0 but no nitrites have developed yet. It registeres at ZERO. Based on what I've read, the nitrite level should be high, and killing the ammonia but it's not. What do I do? I had to do a partial water change last night because my dwarf gouramies are dying. Help!!