Replacement filter sponges intended for use with the Ocean Free Hydra Filtron external filters. This Foam Pad captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom-sized, it fits perfectly inside the filter chamber to prevent debris bypass. The foam pad has a pore size that allows efficient water flow, less clogging and long-lasting filtration.
It is recommended to change your aquarium filter sponges once every few months or when it no longer holds its shape. It is best to not replace all the sponges and other bio media at the same time in order to keep the bulk of your beneficial bacteria present for biological filtration.
Sold in packs of 2.