Fluval Pre-Filter consists of inert, solid ceramic rings used to trap large and medium solid particles before they clog the finer sieves of the media baskets above. The media forces water into many complex paths as it moves through this layer. This further increases its mechanical and biological activity and expands the actual contacted filter area. An additional benefit, it supports large populations of bacteria for proper biological action on ammonia and nitrite. This reduces the need for frequent changes of the active filter media. Pre-Filter is permanent, and requires only occasional rinsing. This media can be used in fresh and marine environments without difficulty.
All In One External Filter
How to use:
$29.50External design, save space and keep the tank neat. Easy assembling to connect with canister filter. With high quality of ceramic diffusing tube, assures the best diffusing effect. With transparent chamber, visible to check water flow and speed of CO2 diffusing through internal impeller. Assembling design for cleaning and replacing ceramic easily.
New V shape design prevent CO2 pipe to be bended.