CPR toilet won't stop flushing...fixes? Anyone? Anyone?

[ufotofu]

Just got my tank up and running over the weekend (build thread to follow). I went with the CPR overflow (600gph version). Works great except for the VERY LOUD flushing sound...definitely working on my nerves after 3 days.

I have to change the prefilter configuration every so often to keep the noise at a minimum (which is still loud enough to wake the dead). Right now it is running w/o the prefilter sponge or plastic screen/airtube setup. I have a dvd case covering all but about 1/4" opening to further muffle the noise (still dang loud). I can't get the factory spec'ed setup to work right - no matter the height of the airtube it always makes a sucking noise like King Kong clearing his sinuses (nonstop).

I have a 50 gal tank being fed by a Quiet One 3000. Based on my head height, I figure I'm flowing close to 600gph. I've got the recommended air pump (Aqua LIfter) constantly running.

Is there a fix for this thing as-is, or should I invest in a durso standpipe or some other standpipe config? Anyone have any experience using these:
http://www.premiumaquatics.com/Merc...OD&Product_Code=KS-ASI-1&Category_Code=Wetdry

Thanks,
ufotofu

 

[Len]

The stockman ("mini durso") will work to eliminate the flushing sound. Or you can put a gate valve on the output of the drain to restrict it a little so it isn't sucking up so much air.

 

[ufotofu]

I'll try the gate valve first b/c it's the easiet/cheapest. Thanks for the suggestion.

BTW, the Top Fathom TF200 skimmer is working GREAT! Took a couple of hours to start frothing, but then it kicked into high gear and has been pulling darker and darker dry foam ever since. Great skimmer for my application!