The Red Sea Sump Modification Kit (R35475) is an aftermarket accessory designed to enhance and customise the functionality of Red Sea aquarium sumps. This kit includes various components, such as baffles and media racks, allowing aquarium enthusiasts to tailor their sump system to better suit their specific filtration and water flow needs. Ideal for hobbyists looking to upgrade or modify their existing Red Sea sump, this kit offers a practical solution for optimising aquarium filtration efficiency and overall system performance.