Throw the and nitrate sponges away don't need them. Complete waste of money.
Have to change them every six weeks and not proven they work.
I would throw the nitrate sponge away as there a complete waste of money.
You have to replace it every six weeks.
JUWEL Filtermedia! Made to fit each Filter System! Use the filter baskets for your filter system to make maintenance even easier! The coarse, the fine blue filter sponges and the highly porous filter material CIRAX contain the most important bio - cultures, which are the key to effectively clean the water. The highly porous filter material CIRAX with its extremely large surface offers an ideal livinge space for bio-cultures and ensures the highest water quality. To maintain this water quality we suggest to replace CIRAX every 9 - 12 months. Please observe the maintenance guidelines in your instruction manual for furhter details.
Cirax Bioflow 3.0 / Compact
Measurements: 9.9 x 9.9 x 4.8 cm
Productcode: 88056
I would just transfer some standard blue sponges over to the tank.