<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&#046; We have the solution&#046; Cdx is a carbon dioxide absorption system&#046; Simply put cdx media in our phosban react and connect to air intake of protien skimmer with our cdx adaptors&#046; 750ml last 6&#045;8 weeks average o 50&#045;100gal reef aquarium&#046;</p><ul><li>750 mL</li></ul>