Filter Gravel – Filter Sand #5, 20kg Bag (5-6)

<p>Support gravel layer for backwashable media vessels — sits beneath the main filtration media (carbon, resin, calcite, sand or glass) to stop it blocking the lateral/drop tube screen.</p><ul><li>20kg bag, 3-6mm gravel</li><li>Recommended base layer for FSA media vessel systems</li></ul>