Lately I've been looking at my Tunze 6105's and have been wondering why they are so much weaker that the newer Jebao wp-40's that aren't rated much stronger in the GPH category. Today I dipped the Tunze's in a Muriatic bath and was surprised to see that they housings were about 70% plugged. Now my 210 has massive flow. Probably too much and I'll be shocked if I dont lose some polyp extension if I dont turn it down. I haven't cleaned them since setting my tank back up just under a year ago.




