I just got a brand new Rena XP4 filter. It appears to be working fine, but it is making this strange noise periodically. It kind of sounds like a high-pitched chirp - as if some air bubbles or something are being forced through something else. Does that make sense?
I tried gently rocking the filter in hopes of dislodging any air bubbles but it hasn't helped the problem.
Any ideas?
I tried gently rocking the filter in hopes of dislodging any air bubbles but it hasn't helped the problem.
Any ideas?