68G cube becomes a 95G Reef :)

[GreenSpottedPuffer]

Originally Posted by lastlight

Never seen an overflow done like that! Not too invasive and looks cool too. Guess it can't be married with a Herbie really...that method brought me TOTAL silence when I finally got my gate valve perfect.

Yes it can. You need a second hole though that is just a bare pipe extending up just above where the PVC overflow skims water. So it will only kick in if the water rises up too high in the display. Just like in a normal overflow box except this emergency drain is separate from the main overflow.

Does that make sense?

Basically the emergency drain can be anywhere as long as it leads back to the sump and is above the water level of the main drain.

It has been done by a guy on RC on a 180G tank (I think). He says its dead silent and he has a coast to coast overflow. Not really seen in the tank.

I wish I had the second hole! That is my favorite way to plumb a tank by far. It really is dead silent.