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Pet Forum / Aquaria / Marine Reef / September 2003Why holes in bottom of tank?
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 "thePoet" <thePoet_usenet@dfsoftware.com> 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 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 > 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 > 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 Richard.Reynolds@usa.net 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 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. > 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 [quoted text clipped - 16 lines] > > thePoet 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 > 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 [quoted text clipped - 16 lines] > > thePoet It look like a LFS type of tank. Middle are compartment and the end are either return or drain. CapFusion,... > 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 [quoted text clipped - 25 lines] > > > > thePoet |
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