Chizer & Bunoi 67 gallon

[lastlight]

I've had my emergency that close to my primary. They key is making really fine adjustments to the gate valve so that the trickle going down the emergency is small enough that it is silent... like a thin coating of water on the walls of the pipe going down.

Greg - I edit that part out. I realized I wasn't using an aquarium calculator. duh!

Skimmin - Thanks for the kind comments. I was able to leave the return pump fully open.

Steve - Your method worked very well. It sure is time consuming and cutting a 1/4" of PVC off on the mitre off is scarry. The rebound and kick back sure is dangerous.

Brett - I have my emergency drain sitting high in the sump so the thin drain doesn't work. I did this on purpose so that I could whether something was wrong with the primary.
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Thank you everyone. I ended up cutting the primary 1" and the emergency is now sitting 1/4" under the weir itself. No crashing noises or vortex happening. The emergency also works flawlessly.

I stuck a piece of 1" gym memory foam under the return pump which helped some what dampen the noise, but you can still hear a hum/vibration. I'm thinking maybe it's the vinyl tubing from the pump to the hard pvc? Or maybe I am hearing the echoing inside the stand itself?

There are only two drains on this herbie.

[sphelps]

Originally Posted by ChizerBunoi

Steve - Your method worked very well. It sure is time consuming and cutting a 1/4" of PVC off on the mitre off is scarry. The rebound and kick back sure is dangerous.

Ha, I know all about that. Keep the saw down until the blade stops moving. You usually get a kick back by lifting it back up with the blade still going full tilt.

Glad you got everything working.