Howdy,
Do you have snails in your tank? My Eheims never had problems, but I don't know about Rena. I have a cheapo hanging filter on my quarantine tank, and snails like to go on a roller coaster ride every once in a while ... better safe than sorry, take it apart, clean it thoroughly, and see if that helps.
Good luck,
HarleyK
Do you have snails in your tank? My Eheims never had problems, but I don't know about Rena. I have a cheapo hanging filter on my quarantine tank, and snails like to go on a roller coaster ride every once in a while ... better safe than sorry, take it apart, clean it thoroughly, and see if that helps.
Good luck,
HarleyK
now i think i know why it went noisy... when i completely cleaned my tank 3 days ago and emptied it out i saw kinda a bunch of very tiny snails on my driftwood and aquarium. maybe that's the reason.
Just kidding. I am curious if this really is a brand issue, so bring it on! 
