I have a 30 gallon Oceanic tank I just acquired over the weekend. It's got the granite trim. I bought an AquaClear filter for it but it seems the trim is too wide for the filter to sit down far enough. There is a lip around the inside of the trim preventing the filter from fitting down. Since it doesn't fit down the outlet for the water is too close to my glass top and half the water runs on to it rather than back into the tank. I also use Penguin Bio-wheel filters on my other tanks so I tested one of those on there for fit and it doesn't seem to fit either. Has anyone else had this problem? What kind of filter do you use with your Oceanic tanks?