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This original rubber Oase Replacement seal for Oase BioMaster pre-filter fits the following models:
-BioMaster (thermal) 250
-BioMaster (thermal) 350
-BioMaster (thermal) 600
-BioMaster (thermal) 850
NO. 20
OAS-45149
This original Oase suction button fits the following models:
Oase BioMaster 250EHEIM Vaseline or special grease keeps rubbers and rotors flexible for longer. When maintaining the aquarium filter, Vaseline can be applied to the rubber sealing rings and other rubber parts. When the rotor is cleaned, a little Vaseline can also be applied to it for a longer lifespan.