Biosmart 36000 by Oase (UK) LtdThe classic returns. The successful model, Biotec 10. 1, frees the pond of bothersome suspended algae, removes excess nutrients and thus ensures sustainably healthy water. This flow through filter is characterised by a high level of oxygen enrichment and a high water flow through rate. The different filter foams offer the necessary volume and a large surface for optimal development of the filter biology. Product characteristics at a glance: Fish waste