Internal drain

JTL · 06/10/2017, 04:57 PM

I have always used the inside weir with the outside pipes. How does the inside weir drain work when the pipes are going through the base of the aquarium? I get the overflow part but what about the water that is in some cases over 20" below the weir. Doesn't it get stagnant?

Vinny Kreyling · 06/10/2017, 05:08 PM

Constant flow into the box moves the water around.

mcgyvr · 06/10/2017, 05:24 PM

It can certainly get stagnant.. Many throw a small powerhead down there..
Just another "downside" to that type of overflow setup.

JTL · 06/10/2017, 05:35 PM

Quote:

Originally Posted by mcgyvr

It can certainly get stagnant.. Many throw a small powerhead down there..
Just another "downside" to that type of overflow setup.

That was my thought. There is no way the water at the bottom of that box gets moved to the top. Don't hear much about that issue.

Lsufan · 06/10/2017, 08:11 PM

I believe a lot of people with the reef ready tanks have set it up as a herbie, in which case the syphon can be lower in the box. If the sump can handle the backflow then u can pull the water all the way from the bottom of the overflow box

ca1ore · 06/10/2017, 08:17 PM

It really isn't a problem in all but the lowest flow systems. In my dual corner flow tank, I can see a gentle flow of water in the bottom of each overflow. I can tell because the many feather duster worms that grow down there are moving. Drop a powerhead if you must, it isn't necessary though.

06/10/2017, 04:57 PM	#1
JTL Registered Member Join Date: Jun 2003 Location: Venice Island, FL Posts: 2,532	Internal drain I have always used the inside weir with the outside pipes. How does the inside weir drain work when the pipes are going through the base of the aquarium? I get the overflow part but what about the water that is in some cases over 20" below the weir. Doesn't it get stagnant? __________________ John 100 gallon DT and 50 gallon sump with refugium. Reefbreeders Photon V2+.

06/10/2017, 05:08 PM	#2
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Constant flow into the box moves the water around. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

06/10/2017, 05:24 PM	#3
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	It can certainly get stagnant.. Many throw a small powerhead down there.. Just another "downside" to that type of overflow setup. __________________ Who me?

06/10/2017, 08:17 PM	#6
ca1ore Grizzled & Cynical Join Date: Apr 2006 Location: Stamford, CT Posts: 17,319	It really isn't a problem in all but the lowest flow systems. In my dual corner flow tank, I can see a gentle flow of water in the bottom of each overflow. I can tell because the many feather duster worms that grow down there are moving. Drop a powerhead if you must, it isn't necessary though. __________________ Simon Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones! Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs

06/10/2017, 08:11 PM	#5
Lsufan Registered Member Join Date: Nov 2013 Location: Baton Rouge Posts: 1,410	I believe a lot of people with the reef ready tanks have set it up as a herbie, in which case the syphon can be lower in the box. If the sump can handle the backflow then u can pull the water all the way from the bottom of the overflow box