Well, I setup my 10 gallon about 3 days ago, and I put sand in it. I did wash it out first, let the water run over the bucket and run my hands through it for about 20 minutes, and I did it twice. I put the sand in the tank, and two days later, it's still cloudy. I don't have a filter, so is this my problem? What can I do to make the water clear? Thanks in advance.