【Shrimp protection filter】 Stainless steel basket protects shrimp and fry from being sucked into the filter. 【Quality Stainless Steel】 This sturdy filter guard is made of durable stainless steel and acrylic. Does not rust easily. They are sturdy, compact and resistant to deformation. Ideal for long term use and replacement. 【Easy to use】 Cover the sponge directly over the water inlet of the filter cover. They can easily be connected to the air inlet of the filter, like the filter, filter tank and other associated filtering equipment. 【Easy to clean】 If cleaning is required, simply brush off the dirt that has accumulated by hand or a soft brush such as a toothbrush from the filter guard. 【Versatile】 Ideal for tropical fish farms, koi ponds, sewage systems, cooling towers and other commercial and industrial systems. Features: Good choice for your aquarium percolator. Ideal for bio-balls, activated carbon, ceramics and ammonia remover. Traps particles and debris, improves biological