HOB Floater Protection, Water Level Adjusting Floater Protection, Small, Medium, and Large. Aquaclear filter lid helping manage nitrate levels and

helping manage nitrate levels and other dissolved waste

It also provides room for aquarium plants to grow

For optimal cooling

Aquarium safe materials

New replacement lids for Fluval Flex 15 gallon fish tank include many great features and possibilities that are not available with the stock lid

HOB Floater Protection, Water Level Adjusting Floater Protection, Small, Medium, and Large. Aquaclear filter lid helping manage nitrate levels andHOB Floater Protection Adjustable Water Level Guard for Hang On Back Filters Protect your aquatic life and improve your filter performance with this Water Level Adjusting Floater Protection, designed specifically for Hang On Back (HOB) filters. This simple yet effective attachment helps maintain a consistent water level around the intake while preventing shrimp, snails, and small fish from getting too close. Available in 3 Sizes: 4", 6", and 10" Why