When you are looking for ways to filter your tank you have a couple of options, but it all depends on how big your aquarium is to what solution you need. Internal filters are compact and can sit inside your aquarium fish tanks, which is a great space saver. Whereas external filters, are well external to the tank and can be stored in a cabinet under the tank or on the side next to. If you are unsure about what filter will be best, or you just need some advice in setting up your aquarium fish tank, use our live chat feature and we will help you!