Aqua sobriquet
Member
Buy and fit the new plate.Does anyone know how to upgrade a mk1 850 with the 'concave upgrade'?

Oase Filter Head Plate BioMaster Filter – Part 93136
Oase’s new and improved replacement filter head underside plate for the BioMaster filter range. This newly crafted concave filter head plate is designed to effectively direct air bubbles towards the motor head. This reduces air pocket build up and raises the water level which promotes motor...
