<h2>Two Little Fishies - CDX CO2 Absorption Media</h2><p>Aquarium: Liquid Fish Foods</p><p>Sometimes its the carbon dioxide that accumulates in the air in closed buildings thats wont let the ph of your aquarium stay up. We have the solution. Cdx is a carbon dioxide absorption system. Simply put cdx media in our phosban react and connect to air intake of protien skimmer with our cdx adaptors. 750ml last 6-8 weeks average o 50-100gal reef aquarium.</p><ul><li>750 mL</li></ul>