overflow effectiveness

[Anonymous]

I've seen some overflows cut into tanks that simply notch out the top of the tank along the back then have the overflow box externally mounted. Now from what I remember about the internally mounted overflow boxes was that the total capacity (after the piping size) was a function of the perimeter size, so I was curious if that meant you needed to make a really long overflow to compensate? or what?

 

[Anonymous]

The size of the notches is a major factor.

 

[minibowmatt]

Acrylics posted some good info in my thread on this topic a few months ago.
http://www.reefs.org/phpBB2/viewtopic.php?t=82133

HTH...

Matt

 

[Anonymous]

Seven: This is glass I want to make this as painless as possible, so no teeth, just one long groove/slot cut out

Matt: Thanks, that gives me some good insight, I am a little sketpical about the 1 square inch = 150-200gph, since I have a 1inch diameter bulkhead on a frag tank and it easily lets more than that through and the water line isn't even to the top of the bulkhead. But it gives me some idea of what I should do.

Perhaps I'll even put some eggcrate infront of it... well after the first time a fish gets sucked over

 

[Anonymous]

I think you can sand-blast any shape you want on glass. But there, it won't be an easy DIY type of thing unless you already have the equipement.

 

[Anonymous]

Seven: This is glass I want to make this as painless as possible, so no teeth, just one long groove/slot cut out

Matt: Thanks, that gives me some good insight, I am a little sketpical about the 1 square inch = 150-200gph, since I have a 1inch diameter bulkhead on a frag tank and it easily lets more than that through and the water line isn't even to the top of the bulkhead. But it gives me some idea of what I should do.

Perhaps I'll even put some eggcrate infront of it... well after the first time a fish gets sucked over

Cut your slot in the glass tank as one big long slot and then silicone on a sort of comb made from plexiglass or acrylic so that you have teeth. Then if you don't like the teeth and want to change them all you need to do is razor blade the comb off...

 

[Anonymous]

Cut your slot in the glass tank as one big long slot and then silicone on a sort of comb made from plexiglass or acrylic so that you have teeth. Then if you don't like the teeth and want to change them all you need to do is razor blade the comb off...

Good advice.. - You'll probably want to keep the teeth though.. - Snails / fish WILL go wandering on you.

I recently had a "lost" clown that managed to get into my internal overflow which has pretty fine teeth.. - How it got in there and then survived for 2 months and then for 3 days with no circulation or heat while I transported everything else I have no clue but MAN was it happy to meet back up with the rest of the crew again. :lol:

 

[Anonymous]

Yeah I'll probably glue on some egg-crate "teeth", I had a couple HOB overflows I always "lost" fish in, they didn't die they just ended up in the back overflow (Thank god for the standpipe!) they learn after a while though I think