Freshwater. Choose this option for hang on the back (HOB), canister, undergravel or sponge filters.
Overflow. Choose this option if you are building a reef system or if you don't want to hang a filter on the back. You will also need one of our external filters.
Black Bottom. Enhances the visual display, especially in reef setups.
*Smaller freshwater tanks ship the quickest. Larger tanks with more options take longer.