Overflow Size

[BigH55]

i have to put an overflow in my frag tank which is 30"x13"x6.5" tall. How big wiould you make the overflow if you wanted it to flow at 250 gph. I looked at the calaculator on RC and they recommended 4 linear inches. so if I made it 2"X2" would I be okay?

 

[ccCapt]

I don't follow you. Do you want to make your own HOB overflow?
I'm not 100% sure, but I think 4 linear inches is 4" long, not 2" x2".

 

[BigH55]

Its inside the tank. I didnt have them put it in becasue it would have cost another 75 bucks.

 

[ndepratt]

is it tempered? can you not just drill the back of the tank yourself, and put a bulkhead and an elbow in?

 

[BigH55]

Its acrylic so I can drill it myself, which I plan to do. After talking to a friend im going the elbow route. I just have to get the bulkheads and im good to go. Will it gurgle very bad. My old lady will be pissed if its noisy.

 

[ndepratt]

install a durso and it'll be super quiet.

installed so many in living rooms. :P

 

[BigH55]

Thats exactly what I needed. Thanks. Also, im thinking of running an external Quiet one pump rated at 870 gph I know its over kill but im going to t it off and make a closed loop like system.

 

[BigH55]

How far from the top of tank and how big of bulk heads would you use?

 

[ndepratt]

about 1.5"-2" from the edges of the acrylic sheet, IMO.

870gph, but what rating at your head height? I'm not too familiar with those pumps... however even with that GPH rating i'm sure you'll be just fine if this is plumbed into your existing system.