Ceramic Bakki rods are among those elite materials that collect Oxygen under water along with the Bacilli bacteria so desperately needed in aquaria. Nitrosomas are gram negative oxidising bacteria and do fine without Oxygen but without sufficient ceramics in aquaria, there is very limited gram positive reducing bacteria to remove Nitrates, Fats, Proteins, etc.. Get em and get filtered. 

Bakki Rod premium ceramic media

AU$3.00Price