UNINTERRUPTED FLOW OF BUBBLES: Our Bendable Aquarium Bubble Walls make for a great way to aerate and oxygenate your fish tank! Watch as the bubbler produces a nice and steady stream of bubbles! They’re safe for freshwater and saltwater tanks! PLIABLE, POROUS, AND WEIGHTED: These Aquarium Bubble Walls bend and conform to any shape, and will stay seated at the bottom of your fish tank. For aesthetics or added space and comfort, they can be buried beneath gravel or other aquarium substrates. PLEASE NOTE: These Bubbles Walls are not intended to be cut to size. We recommend you bend them into shape and around aquarium décor. MEASUREMENTS: Overall Length = 23.5” SHOP PENN-PLAX FOR ALL YOUR PET’S NEEDS: PENN-PLAX is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.