Retired Viking
Fish Connoisseur
It is a 30 gallon, and I am thinking about the UGF but I also bought a sponge filter. Will see which one make more sense when I put the castle in and see what I have for room. The castle is pretty big at 24 inches across, leaves me with 6 inches of space on the sides but there is space in the middle rear since it is in a "u" shape.Cool! How many gallons is that? Is that an under gravel filter?