![I have Oase biomaster 250 making grinding noise with very low water flow. I tried tilting, priming to make sure no air bubbles left and also waited for 24 hours .I have I have Oase biomaster 250 making grinding noise with very low water flow. I tried tilting, priming to make sure no air bubbles left and also waited for 24 hours .I have](https://external-preview.redd.it/icVReIZ_ddJu3frzmozH6V8pjDE4xl1r_UIAoeljKLE.png?width=640&crop=smart&format=pjpg&auto=webp&s=2e4321a6c23d2c94539a5a7ca7172a84497b4230)
I have Oase biomaster 250 making grinding noise with very low water flow. I tried tilting, priming to make sure no air bubbles left and also waited for 24 hours .I have
![Oase BioMaster Thermo 250 Aquarien-Thermo-Außenfilter ab € 214,89 (2023) | Preisvergleich Geizhals Deutschland Oase BioMaster Thermo 250 Aquarien-Thermo-Außenfilter ab € 214,89 (2023) | Preisvergleich Geizhals Deutschland](https://gzhls.at/i/79/57/2267957-l0.jpg)
Oase BioMaster Thermo 250 Aquarien-Thermo-Außenfilter ab € 214,89 (2023) | Preisvergleich Geizhals Deutschland
![Oase BioMaster Thermo 250 Aquarien-Thermo-Außenfilter ab € 214,89 (2023) | Preisvergleich Geizhals Deutschland Oase BioMaster Thermo 250 Aquarien-Thermo-Außenfilter ab € 214,89 (2023) | Preisvergleich Geizhals Deutschland](https://gzhls.at/i/79/57/2267957-n2.jpg)