[stephaniesquires]

The tank I have now has 2 overflow holes right next to each other with one overflow box in the back center of the tank. I am switching to glass and would like to know opinions about keeping overflow as is or changing it to another design. Tank will be 240 long (96x24x24). One consideration is the sump and stand are already set up for the present configuration, but they can be changed....

[e_baer]

IMO I would go for 3. One in each corner then one in center. That is just me though. that way you get water from all parts of the tank and you also skim the surface of all parts of the tank. Then again, this is all IMO.

[stephaniesquires]

Good point, something to think about (like I need more to think about )

[Waterlogged]

Another way to have overflow:
Saltwaterfish.com Message Boards - DIY Sump

[Mattfish]

FWIW, now that we have a "room divider" tank setup, asingle overflow seems a better way to go for us, but I think in general - water flow is consistent, and more easily controlled, plus less places to leak or have problems.

Ultimately, it's whether the water flow is effective and enough (gph). With a single overflow, in our case, we have a SeaSwirl at the far end from the overflow, and a single in-tank pump buried in the rock at the end near the overflow, but facing the other way and halfway down. We get great cross-current, great surface shimmer, and the general circulation is great.

It seems to me this configuration would work for any tank - once-side-display, or room-divider, and eliminates the wires from too many powerheads, etc.

Now that I've said that, consider that I'm in love with our new system, wouldn't want to find a fault, and am always and still learning....

[pogodzib]

For a 8' long tank, I would think that you'd want either 3 overflows or a continuous overflow weir along the back of the tank with a minimum of 2 drains leaving the box.

BTW - That will be a great looking display tank. It is the same dimensions as the tank that I wanted, but I had to "settle" for a standard 220RR due to shipping costs.

[stephaniesquires]

Originally Posted by pogodzib

For a 8' long tank, I would think that you'd want either 3 overflows or a continuous overflow weir along the back of the tank with a minimum of 2 drains leaving the box.

BTW - That will be a great looking display tank. It is the same dimensions as the tank that I wanted, but I had to "settle" for a standard 220RR due to shipping costs.

It's the same dimensions as the one I have now. And it is pretty (except for the scratches) I have the single overflow box, with two holes now. I am thinking of having Glasscages make the tank and they will customize it, their standard is overflows in each corner... Would you go for overflows in each corner, the back (as it is now) or back and each corner?? I dont know if they will make a continuous overflow weir - interesting idea..

[pogodzib]

Making a continuous overflow weir isn't very tough. All you really need is only need is one standard overflow box with 2 drain holes and then two, tank length pieces of acrylic that are the length of the tank and 4" wide. The overflow weir that runs the length of the tank doesn't need to extend down to the bottom of the tank. I'll see if I can find a pic for you.

[RyanG]

My favorite is the continuous overflow weir idea. I don't think glass cages offers that, I have a simple U tube overflow, since my 75 gallon isn't drilled. However if I get my 180 I would like the weir system.

[stephaniesquires]

Originally Posted by pogodzib

Making a continuous overflow weir isn't very tough. All you really need is only need is one standard overflow box with 2 drain holes and then two, tank length pieces of acrylic that are the length of the tank and 4" wide. The overflow weir that runs the length of the tank doesn't need to extend down to the bottom of the tank. I'll see if I can find a pic for you.

A picture would be great!!!

Originally Posted by RyanG

My favorite is the continuous overflow weir idea. I don't think glass cages offers that, I have a simple U tube overflow, since my 75 gallon isn't drilled. However if I get my 180 I would like the weir system.

I like the continuous idea - sounds like I could do the acrylic 'welding'/glueing once the tank gets here. If I go through Glasscages it wouldn't be here till mid February (that's when the next truck comes to this area) which gives me time to plan...

[pogodzib]

Here's a pic of the way that I think would look and work good. It takes up very little usable space in your tank. It's called a coast-to-coast Calfo style overflow box.



And a quote from the person who's tank this is

"i have found using a coast to coast overflow fantastic for running CLS's off of. i do agree with Fly that they need to be around 7" deep if you are wanting it to have any chance of being quiet.

external is also by far a more prefered design than internal. because of the shape of the back wall and the fact i had a glass tank, internal was my only option.

my coast to coast has about 6000gph going through it. about 5' is for CLS's and about a foot is for overflow. i put a divider in there to allow better surface skimming for the drain to the skimmer.

i will never do another tank again without a coast to coast overflow.

G~"

[glampka]

Somehow that doesn't look like it to me!

[pogodzib]

I see that now. I guess it only shows up when I'm logging into that "other" site as the same time. I'll try to find some different pics.

[RyanG]

I think the view RB as competition, can you believe that? lil old RB?
We didn't used to always be on the hot-linked list.

[pogodzib]

My previous post has been updated. Do agoogle search for "coast to coast overflow aquarium" or "calfo sytle overflow" and you should get other pics. I don't see any pics of RB yet for that style of overflow, although I'm sure someone here has it.

[pogodzib]

Originally Posted by RyanG

I think the view RB as competition, can you believe that? lil old RB?
We didn't used to always be on the hot-linked list.

We're not so little anymore.