??CLOSED LOOP??
- Thread starter DOGMAI
- Start date
hi.
Do a search on this forum, and you should be able to find out what it is. In a nut shell, it is an external circulation setup that does not involve open container, such as sump.
BTW, althought RDO search is not case sensitive, try to use lower case if you can. :wink:
Do a search on this forum, and you should be able to find out what it is. In a nut shell, it is an external circulation setup that does not involve open container, such as sump.
BTW, althought RDO search is not case sensitive, try to use lower case if you can. :wink:
Depends on how you rig it. Below is a pic on my setup. The pvc pipe on the far right is my closed loop intake. The middle two pvc pipes are my closed loop returns. The pvc pipe on the far left is my sump return. When I ordered this tank, I had the manufacturer do all the hole drilling.
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A powerhead is actually in the tank and is a small device. A closed loop is when an external pump is plumbed directly to the tank. The input sucks water in from a drilled bulkhead or pipe and blows it through the output directly into the tank via another bulkhead or pipe.
Here is a picture of a large tank that has 3 dedicated pumps for a closed loop. Notice how the pump is sucking water from the back of the tank via bulkhead and the input is run over the back edge. This is a major tank, most people I talk with plumb one pump and have 2-3 outputs from that single pump.
The benefits are ALOT more circulation via volume vs. velocity that powerheads give off. Plus not having a bunch of little powerheads cluttering up the tank.
Here is a larger picture of the setup.
http://www.advancedaquarist.com/issues/ ... igure2.htm
Here is a picture of a large tank that has 3 dedicated pumps for a closed loop. Notice how the pump is sucking water from the back of the tank via bulkhead and the input is run over the back edge. This is a major tank, most people I talk with plumb one pump and have 2-3 outputs from that single pump.
The benefits are ALOT more circulation via volume vs. velocity that powerheads give off. Plus not having a bunch of little powerheads cluttering up the tank.
Here is a larger picture of the setup.
http://www.advancedaquarist.com/issues/ ... igure2.htm
Modo...ty for the kind words 
DOGMAI, I do not have a pic of the inside. But each of the three return lines has two of the sprayers in the pic below. Each sprayer is on a joint, so that I can direct the sprayer to any direction that I want. So I have 6 sprayers that I can use to change the water current as I like.
DOGMAI, I do not have a pic of the inside. But each of the three return lines has two of the sprayers in the pic below. Each sprayer is on a joint, so that I can direct the sprayer to any direction that I want. So I have 6 sprayers that I can use to change the water current as I like.
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Hi,
DogMai.. could you please not type in all caps.. it is like you are yelling at us...??? 8O
with a closed loop you can move more water more efficiently then with multiple powerheads. If you plumb them right and use the right pump you can also avoid any heat transfer to the tank....
I didnt have room for a closed loop. so i got rid of my powerheads and got two tunze turbelle pumps. they pump motor is outside the tank and it only has a propeller in the water. each pump puts out 633gph . and i have them on a pulse timer. and no heat transfer. so i got almost 400 gph more of flow with using less space...
they are great...
DogMai.. could you please not type in all caps.. it is like you are yelling at us...??? 8O
with a closed loop you can move more water more efficiently then with multiple powerheads. If you plumb them right and use the right pump you can also avoid any heat transfer to the tank....
I didnt have room for a closed loop. so i got rid of my powerheads and got two tunze turbelle pumps. they pump motor is outside the tank and it only has a propeller in the water. each pump puts out 633gph . and i have them on a pulse timer. and no heat transfer. so i got almost 400 gph more of flow with using less space...
they are great...
With a closed loop you effectivly have zero head pressure as well. There is no difference between the source water and destination water. It's the same body of water.
Overflows tend to be limiting factors in getting flow into a tank. To make up for this you stick in a bunch of power heads in the display tank. Powerheads are water cooled and heat the tank. You have power cords sticking directly in water. They all fail sooner or later. Things get ugly quick when they short. Electrical shocks can be fatal.
Closed loop use external non-submerged pumps that are air cooled, have much higher flow rates. Self-prime, and if you get a decent pump just need to be cleaned once a year to once every other year.
Overflows tend to be limiting factors in getting flow into a tank. To make up for this you stick in a bunch of power heads in the display tank. Powerheads are water cooled and heat the tank. You have power cords sticking directly in water. They all fail sooner or later. Things get ugly quick when they short. Electrical shocks can be fatal.
Closed loop use external non-submerged pumps that are air cooled, have much higher flow rates. Self-prime, and if you get a decent pump just need to be cleaned once a year to once every other year.
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