Cloverleaf Adtec Particle Separation Media Ref: ADTEC MEDIA Whilst the prime function of the PSM is to act in a mechanical capacity the media itself also has a large biological capacity, especially when the media cleaning process only ever involves mature pond water and compressed air (oxygen). Furthermore it should be noted that the conventional brushes (installed as standard to bay No2) are not needed for mechanical filtration purposes, and thus via protection from the PSM will act as an additional quality biological bed. Note:- 15 times more surface area than K1 Price: £69.30 (Including VAT at 20%)