Why holes in bottom of tank?

[thePoet]

I'm looking at a used tank (180 gallon). It has a number of pre drilled
holes in the bottom running down the middle (4 or 5). What would you do
with these? They had to have been made for some purpose, but I can't
think of what it is.

Jared

[Thomas Bishop]

"thePoet" > wrote in message
> I'm looking at a used tank (180 gallon). It has a number of pre drilled
> holes in the bottom running down the middle (4 or 5). What would you do
> with these? They had to have been made for some purpose, but I can't
> think of what it is.

4 or 5? That's a lot; there is usually only one I think. It's to let water
drain out into a sump. Do a Google search on this group for sumps. You'll
get plenty of reading material.

Thomas

[Dragon Slayer]

they are drain and return holes for bulkheads.

my 180 has 4 in it, two 1.5" for drains to the sump and tow 3/4" for return
from the pumps.

HTH
kc

"thePoet" > wrote in message
...
> I'm looking at a used tank (180 gallon). It has a number of pre drilled
> holes in the bottom running down the middle (4 or 5). What would you do
> with these? They had to have been made for some purpose, but I can't
> think of what it is.
>
> Jared

[Richard Reynolds]

> I'm looking at a used tank (180 gallon). It has a number of pre drilled
> holes in the bottom running down the middle (4 or 5). What would you do
> with these? They had to have been made for some purpose, but I can't
> think of what it is.
>
> Jared

depending on there exact location and sizes


generally overflow holes are larger, and return holes are positioned to give movement

its not totally unheard of for a larger tank to have 2 overflow holes nor 2 return holes
and closed loops are also common so many ways are possible

the one that came to mind first would be
1 overflow, 2 returns (for wavemaker or such) and 2 (1 in, 1 out) for a closed loop

though the posibilities are quite large a 180 with that layout would work nicely :)

--
Richard Reynolds

[thePoet]

I should have been clearer. These aren't the wholes for the overflow.
There is an overflow there already with the apropriated holes in the
bottom. This tank looks like this:

-----------------------------------
| / |
| * * * * | * | <-- Overflow at end
| \ |
-----------------------------------

* - hole in bottom

It's the non-overflow holes in the bottom that I don't know whay you'd
do with. Obviously something plumbing related, but you don't want
drains in the middle of the sand.

The odd overflow position is due to it being designed to break up a room,
so that is the side designed to be agains the wall.

thePoet

[Bob Parkins]

Just a guess but....
If it was used as a room divider I could possible see putting bulkheads in
the bottom with intent of having short pieces of pipe and nozzle coming out
of substrate to use for circulation. This would be weird but who knows.
This would give a lot of water movement around and between rocks.

or

Maybe they had dividers for breeding and these were returns for each
section... probably not though.

Can you ask the previous owner?
I can't think of any other reason.


thePoet > wrote in message
...
> I should have been clearer. These aren't the wholes for the overflow.
> There is an overflow there already with the apropriated holes in the
> bottom. This tank looks like this:
>
> -----------------------------------
> | / |
> | * * * * | * | <-- Overflow at end
> | \ |
> -----------------------------------
>
> * - hole in bottom
>
> It's the non-overflow holes in the bottom that I don't know whay you'd
> do with. Obviously something plumbing related, but you don't want
> drains in the middle of the sand.
>
> The odd overflow position is due to it being designed to break up a room,
> so that is the side designed to be agains the wall.
>
> thePoet

[Dragon Slayer]

when it was used as a room divider the holes were drilled as returns to keep
the plumbing in the middle of the tank rather then on one of the two sides
in the middle of a "view"

its quite common to have plumbing come up from the middle of the sand. its
a great way to prevent dead spots in the middle of your rockwork.

kc

"thePoet" > wrote in message
...
> I should have been clearer. These aren't the wholes for the overflow.
> There is an overflow there already with the apropriated holes in the
> bottom. This tank looks like this:
>
> -----------------------------------
> | / |
> | * * * * | * | <-- Overflow at end
> | \ |
> -----------------------------------
>
> * - hole in bottom
>
> It's the non-overflow holes in the bottom that I don't know whay you'd
> do with. Obviously something plumbing related, but you don't want
> drains in the middle of the sand.
>
> The odd overflow position is due to it being designed to break up a room,
> so that is the side designed to be agains the wall.
>
> thePoet

[CapFusion]

It look like a LFS type of tank. Middle are compartment and the end are
either return or drain.

CapFusion,...


"Dragon Slayer" > wrote in message
...
> when it was used as a room divider the holes were drilled as returns to
keep
> the plumbing in the middle of the tank rather then on one of the two sides
> in the middle of a "view"
>
> its quite common to have plumbing come up from the middle of the sand.
its
> a great way to prevent dead spots in the middle of your rockwork.
>
> kc
>
> "thePoet" > wrote in message
> ...
> > I should have been clearer. These aren't the wholes for the overflow.
> > There is an overflow there already with the apropriated holes in the
> > bottom. This tank looks like this:
> >
> > -----------------------------------
> > | / |
> > | * * * * | * | <-- Overflow at end
> > | \ |
> > -----------------------------------
> >
> > * - hole in bottom
> >
> > It's the non-overflow holes in the bottom that I don't know whay you'd
> > do with. Obviously something plumbing related, but you don't want
> > drains in the middle of the sand.
> >
> > The odd overflow position is due to it being designed to break up a
room,
> > so that is the side designed to be agains the wall.
> >
> > thePoet
>
>