Hey, really dumb question here... I have always done open topped aquariums, but recently, I just bought an older acrylic aquarium with a top piece of acrylic on it. It has the cutouts and covers to get stuff in and out of the tank, but since most of the top is not removable, how do you guys keep that clean of salt creep and other junk? I am getting powerful lights, and want to make sure most of the light gets through. I prefer open top aquariums, but I could not pass on this deal! The fish tanks direct is about what it looks like on top, but it has acrylic covers for each of the holes.