．Size：Ø13mm / Ø20mm
．pH Value：7.0~7.5
．Specific gravity：250g / 0.5L
．The right pH range keep the fish right, UP produce specially the pH
range of ceramic filter media between 7.0~7.5. This filter media not only
with many cracks and the surface area is large which can proliferate
bacterium in a large amount to stabilize water quality but also with the
function of buffer water quality, it's the best choice for most of freshwater
fish, especially for Dragon Fish, Skate...etc.