Tunze Turblle Stream 2 pump 6065

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When I cleaned every parts, I didn't see any calcium build up, but I will soak in vinegar this weekend. It doesn't heart.
And also I will take my pump to LFS to find housing and/or impeller. Hopefully, I can test my pump when I replace one of them or both.

I use to own Hydor Koralia, and did same, but before I replaced any, it just dead. That's why I've got this pump.