NP-reducing BioPellets are composed of biologically degradable polymers that can be placed in a fluidized filter. The pellets will allow aerobic growth of bacteria which consequently will consume nitrate and phosphate, and produce CO₂, H₂O and CaCO_3. In addition, some anaerobic layers will develop, resulting in additional denitrification. The surplus of bacteria will be skimmed off or eaten by filter and suspension feeding organisms, such as corals and sponges. For this reason, we advise to place the outlet of the pellet filter in front of the protein skimmer. This has the additional benefit of increased gas exchange (CO₂-removal and O₂-addition).

On average this “solid wodka method” takes a few weeks to give rise to sufficient bacteria to allow nitrate and phosphate levels to drop. The pellets are consumed by bacteria, which is why new pellets need to be added every 3-6 months. This can be seen during inspection of the filter. We advise using 0.5-1 liter of pellets per 500 liter of system volume, and adding 100 ml of pellets every 3-6 months. Of note, these ratios depend on tank conditions and are strongly influenced by feeding regimes and livestock. When heavy feeding is required, we advise to combine the pellets with standard phosphate adsorbents. The reason for this is that most aquafeeds contain higher levels of phosphate than is consumed by bacteria, fish and invertebrates, when compared to nitrogen sources in the food.

Important! When the water flow in the pellet filter is too low, this may result in a large population of anaerobic bacteria, with the possible danger of H₂S production. Always maintain high water flow through the filter in order to get optimal results. Usage of ozone and UV lamps will negatively affect bacterial recruitment of the biopellets and increase filter maturation time. Adding bacterial cultures to the water may shorten filter maturation time.  

Ordering:

Retailers and private customers click here.