This product will be ordered after receiving payment (delivery time after receiving payment ca. 1 week) Blufibre is a synthetic fibre, neutral and non-toxic, which ensures an effective mechanical water filtering action. Perfect to be inserted inside the suitable bulkheads of the internal aquarium filter Bluwave, this filtering material is also ideal to be used in combination with the resin rocks for turtle tanks Dover. Maintenance: we recommend to clean periodically the filtering material Blufibre in case you have introduced it inside the rock Dover. Package of 100 g. net.