Handmade aquarium filters built in the U.S.A.
Big Block Aquarium Filters (patent pending) are custom built internal filters that incorporate three different, well established forms of filtration (moving bed, bio media and sponge). Each filter is hand built and assembled using all new materials and can even be customized to your specifications.
Constructed from durable and non-toxic pvc, our filters are easy to maintain and monitor. Plus, with no moving parts there’s nothing to break down on you.
Take a look at our standard sizes or give us a call to discuss your needs and we’ll make you a truly custom filter!