Fiji Cube Overflow

[mpnunley]

Can someone give some advice on drilling a tank for a 1200 gph overflow i am installing this on a rimed 75 gallon tank with 1" trim i would like the water line so you can't see it but not so high that its going to overflow the tank any advice would be greatly appreciated just not sure where to drill the holes
Thanks

 

[CoralB]

If you’ve never done it before it could be a little hairy . I’d go to someone who has experience Pryor

 

[mpnunley]

If you’ve never done it before it could be a little hairy . I’d go to someone who has experience Pryor

I tried it on a 60 breeder and it didn't flow right and the water level was at the top of trim about to run over so I figured I drilled it to high the inside weir was above the top of the tank I thought that would put my water line about where I wanted it to be but it was to high

 

[UncommonSense]

Can someone give some advice on drilling a tank for a 1200 gph overflow i am installing this on a rimed 75 gallon tank with 1" trim i would like the water line so you can't see it but not so high that its going to overflow the tank any advice would be greatly appreciated just not sure where to drill the holes
Thanks

There are quite a few how-tos around this site on drilling glass, some of which I’ve written! I recommend a quick search on the topic!

It’s worth asking, did this overflow come with a drilling template? Also, what method(s) did you use to drill your 60G prior?

 

[mpnunley]

Can someone give some advice on drilling a tank for a 1200 gph overflow i am installing this on a rimed 75 gallon tank with 1" trim i would like the water line so you can't see it but not so high that its going to overflow the tank any advice would be greatly appreciated just not sure where to drill the holes
Thanks

There are quite a few how-tos around this site on drilling glass, some of which I’ve written! I recommend a quick search on the topic!

It’s worth asking, did this overflow come with a drilling template? Also, what method(s) did you use to drill your 60G prior?

Yes it came with a template. and I used the template but I marked the water line about .5 inches above the water line on the template but it put the inside weir higher than the trim of the tank. I have looked around R2R and found a few post about drilling glass. I'm good with the drilling part of it just not sure on the hole placement so my water line will be where I want it and it still drains like its supposed to

 

[UncommonSense]

Yes it came with a template. a I used the template but I marked the water line about .5 inches above the water line on the template but it put the inside weir higher than the trim of the tank. I have looked around R2R and found a few post about drilling glass. I'm good with the drilling part of it just not sure on the hole placement so my water line will be where I want it and it still drains like its supposed to

Well, you can assume that the water line will be around 1/4” above the bottom of the teeth during operation, so I like to set my teeth so they’re JUST below the bottom of the tank rim!

(The water packs up and forms a “meniscus” before spilling over the bottom rim of each slot, which will increase the water line probably 1/8” beyond the bottom of the slot, even at minimum flow… then, water packs up more and more as flow increases beyond a trickle!)

 

[mpnunley]

Well, you can assume that the water line will be around 1/4” above the bottom of the teeth during operation, so I like to set my teeth so they’re JUST below the bottom of the tank rim!

(The water packs up and forms a “meniscus” before spilling over the bottom rim of each slot, which will increase the water line probably 1/8” beyond the bottom of the slot, even at minimum flow… then, water packs up more and more as flow increases beyond a trickle!)

What if I put the top of the inside weir up tight against the cross brace in the middle of the tank I wouldn't be able to take the lid off and that would leave about 1"of the weir teeth under water and about a .5" of the weir teeth above the water line would that work?

 

[UncommonSense]

What if I put the top of the inside weir up tight against the cross brace in the middle of the tank I wouldn't be able to take the lid off and that would leave about 1"of the weir teeth under water and about a .5" of the weir teeth above the water line would that work?

You don’t just want to ram it in there… you want to take extremely precise measurements, and double, then triple check those measurements before committing to living with the holes where you put them!

You definitely want to be able to remove the overflow box lid…

The weir teeth directly dictate the tank’s operating water line, you put them where you want the tank’s water line to sit, as explained above!

 

[mpnunley]

You don’t just want to ram it in there… you want to take extremely precise measurements, and double, then triple check those measurements before committing to living with the holes where you put them!

You definitely want to be able to remove the overflow box lid…

The weir teeth directly dictate the tank’s operating water line, you put them where you want the tank’s water line to sit, as explained a

 

[mpnunley]

That's how I did the 60 breeder and it set the water line way to high I had to cut the trim back on the inside and the out side of the tank to get the overflow to set flush with the tank and the weir set above the trim of the tank maybe I just not understanding just what you mean. I don't really want the inside weir sticking out of the back of the tank. This overflow box the inside weir does come off so you can clean it don't know why I would need to take the top off. I'm just trying to understand what you mean so I can do what you are talking about so I don't mess this tank up.

 

[UncommonSense]

That's how I did the 60 breeder and it set the water line way to high I had to cut the trim back on the inside and the out side of the tank to get the overflow to set flush with the tank and the weir set above the trim of the tank maybe I just not understanding just what you mean. I don't really want the inside weir sticking out of the back of the tank. This overflow box the inside weir does come off so you can clean it don't know why I would need to take the top off. I'm just trying to understand what you mean so I can do what you are talking about so I don't mess this tank up.

So, here’s a photo of the overflow I believe were both talking about, with a line drawn to crudely approximate where the tank’s operating water line will be:

You should set that internal overflow box portion on a table, and measure from the table up to the top rim of the bulkhead holes… then measure from table up to bottom of those slots cut in the internal overflow box portion… the difference between these two measurements is how far down from the tank top rim’s edge you want the top rim of your bulkhead holes!

Basically, you want those overflow slots to start at, or just below the top rim’s bottom edge, as they dictate the height at which water physically starts draining out of the display!

 

[mpnunley]

So, here’s a photo of the overflow I believe were both talking about, with a line drawn to crudely approximate where the tank’s operating water line will be:

You should set that internal overflow box portion on a table, and measure from the table up to the top rim of the bulkhead holes… then measure from table up to bottom of those slots cut in the internal overflow box portion… the difference between these two measurements is how far down from the tank top rim’s edge you want the top rim of your bulkhead holes!

Basically, you want those overflow slots to start at, or just below the top rim’s bottom edge, as they dictate the height at which water physically starts draining out of the display!

Ok I think im getting what you are saying thank you for explaining that to me that's what I will do thank you and I will let you know how it worked out its going to be the first of next month before I can get the rest of my plumbing but I will let you know thanks again

 

[UncommonSense]

Ok I think im getting what you are saying thank you for explaining that to me that's what I will do thank you and I will let you know how it worked out its going to be the first of next month before I can get the rest of my plumbing but I will let you know thanks again

Just be sure to give it a double check, and a triple check before committing to cutting holes! - they’re there forever once they get cut!

(Yes, you can technically plug mistake holes with capped bulkheads and try a different pane of the tank, but who wants to do that?!)

 

[mpnunley]

Just be sure to give it a double check, and a triple check before committing to cutting holes! - they’re there forever once they get cut!

(Yes, you can technically plug mistake holes with capped bulkheads and try a different pane of the tank, but who wants to do that

 

[mpnunley]

I will thank you man. And I know I don't that's why I went and bought another tank