I have a ten gallon tank divided into two compartments for two of my babies. However, The filter that came with the tank moves the water WAY to much, and neither one of them like moving water at all. So, right now the tank is unfiltered, and I just do 50% water changes with a gravel vac every 1-2 weeks. However, I really want to get it filtered. Are there any filters out there that don't move the water very much?