The Lifewithpets tank divider is Compatible with Aqueon tank size 20.25 x 10.5 x 12.6 only. The divider DOES NOT fit other sizes of 10 gallon tank. All 10 gallon tanks are not the same size. Please measure carefully before buying. The 10 gallon tank divider is perfect for Betta Fish tanks, or if you need to separate fish. It is made from a solid non toxic material with adjustable sidebars. The clips are used on the rim of the tank for added stability. The divider does NOT work in rimless tanks . It works best in a tank with substrate and is not suitable for bare bottom tanks. It comes with a full instruction sheet and video link to help with installation. Things to note before buying: These dividers are not flimsy and have been made with Betta Fish in mind. You may find you require filtration in each section to help with water flow. **Sale is tank divider only ****All Betta fish may not be suited to divided tanks.