Hey fish keepers! Tired of your fish fighting or need to separate babies from adults? These aquarium divider holders are total game-changers. You get 12 black holders that let you split your tank into multiple compartments using suction cups - no drilling or complicated setup required. Each holder has a 3cm suction cup that sticks firmly to glass, and the slot fits divider sheets up to 3mm thick. The holders work on glass up to 4.8mm thick, which covers most standard aquariums. Measuring about 8x6x2cm each, they're sturdy but don't take up much visual space in your tank. Made from soft plastic, they're safe for your fish and won't scratch your aquarium glass. Perfect for so many situations: keeping aggressive fish separated, creating breeding areas, protecting shy fish, or even just organizing different species in one tank. The black color blends in nicely with most aquarium backgrounds too. Installation is super simple - just clean your glass, press the suction cups on, slide in your divider material (acrylic or plastic sheets work great), and you've got instant compartments. They hold securely but are easy to adjust when needed. Whether you're dealing with territorial cichlids, breeding guppies, or just want to keep certain fish apart during feeding time, these dividers make tank management so much easier. The package comes with all 12 holders, giving you plenty to work with whether you have one large tank or multiple smaller ones. Seriously, if you've ever struggled with fish compatibility issues, these affordable little gadgets will save you so much stress and keep your aquatic friends safe and happy.