Replacement Heater Adapter for all OASE BioMaster Canister Filters & OASE FiltoSmart Canister Filters. This Adapter is a replacement part for the OASE FiltoSmart Thermo & OASE BioMaster Filters. It's also an adapter for those who have the non-Thermo versions of those filters and want to add an OASE HeatUp Heater to their filter.
