Deep Demension Plumbing

[islanddave]

Hello All,

I purchased a 250 gallon dd tank a couple of months back and am now contemplating how to do the plumbing. It has two overflows with 2 1" holes each. It is setup from the factory to run dual duros.

Is the durso method a valid one? My main concern would be safety.

Would running a herbie be better? From my understanding running a herbie on a dual overflow is best accomplished by disabling one overflow column and having it contain a 2nd emergency drain, and the return. Would one corner overflow provide me with enough surface skimming? I am assuming that one 1" drain running at full siphon would give me enough flow, but not sure about surface skimming. Also how do you adjust the weirs on a Marineland tank?

By the way, my opinions have been formed by reading this excellent resource.
http://gmacreef.com/herbie-dual-overflows/

Ideally deep dimension owners share your plumbing schematics with me.:fun2:

Thanks Dave

 

[Johnseye]

Hello All,


Is the durso method a valid one? My main concern would be safety.

Would running a herbie be better? From my understanding running a herbie on a dual overflow is best accomplished by disabling one overflow column and having it contain a 2nd emergency drain, and the return. Would one corner overflow provide me with enough surface skimming?

Thanks Dave

I have run a durso in my dual overflow for over a year. I have 4 1" bulkheads. I'm getting ready to re-plumb herbie. No issues with safety for the durso. Durso's been fine, just a little noisy. I'm hoping to quiet things down with a herbie. I'll have 2 siphons, 1 emergency and 1 return. My only issue is having just one return. We'll see how it goes. Others have said no problem. Also take a look at beananimal for another solution.

 

[islanddave]

Yes ideally that's what I wanted to do too,until I read this(below) from the above mentioned website.......I wonder how "twitchy" the drains would become?


Option 1: Independent Siphon/Emergency in each overflow

Due to the sheer volume of a tank that has two overflows – It’s often a really good idea to have a 2nd emergency line available.

With this setup, both overflows have both a siphon drain and emergency drain — like you would on a tank with only one overflow.

You may want to adjust one siphon so that it takes on less water, just enough to provide adequate surface skimming. The other siphon can then be used as the main point of adjustment, and can be the one that is easier for you to access.

With the amount of water that an single Herbie can move, having two means the siphon valves will be closed-off a considerable amount. This can mean finer adjustments are necessary.

Having two independent overflows can result in having to do too many fine adjustments which can be tedious. For this reason, some people choose to go a different route.

 

[chadfarmer]

u want to replace the return 90s with ones with smaller holes drill your self

 

[islanddave]

Don't quite understand what u mean but would joining the overflow boxes by way of an internal balance tube help? This way the water level inside of the boxes would equalize