Just got a new 5 gallon tank, cylcled it for a week, cleaned everything I put it in it and put the right amount of water in, I have tested the ph and it is 7.1 fine, Ammonia 0, Nirite 0, Nitrate 10. I have a small live driftwood live plant and 2 balloon mollies, the mollies are scratching themselves against everything, 2 feeder fish I had died Plz Help