Clear water scrubber- noise

[scottch]

Got a clear water scrubber CW-50 and really annoyed with how noisy this thing is with the drain. Contacted them and they suggested adding a T with a cap on the end and drilling that to allow air to escape. While this got rid of some of the running water sound, it now is a pulsing kinda wheezing sound which is almost more annoying.

Anyone have suggestions for plumbing the drain on this to not be so insanely noisy?

 

[homer1475]

Not sure what your model looks like, but I put a gate valve on my DIY algae scrubber. Quieted the drain right down. You can tune it like your tank drain so it doesn't slurp or suck air in.