I have a question that seems to go along with a new tank cycle. I too have a ten gallon tank that has been running for about 6 or 7 weeks now. I just recently changed my filter about 3 days ago and now my tank has kind of a dusty look to the water. It's not really cloudy just kind of looks like there is dust floating in the water. I thought it would go away but hasn't. what should I do? Also on a side note. I have a betta in my tank with ten guppies. he leaves all but one of them alone. And the one he didn't leave alone I added after he was in there because one of my guppies died. I was wondering would I be able to remove the betta until my guppies tail healed and then put the betta back or should I just leave him in there and continue to monitor the situation? :;thx in advance for the help.