Water flow and water current...
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Old 09-16-2013, 11:26 PM   #1
tetra73
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Water flow and water current...


I am trying to think outside of the box dealing with the water flow and direction. I have a 40g. I have an API XP M filter with 300gph flow rate. A Maxi Jet 1200 powerhead with 156gph flow rate. So far, I have both of them blowing water from my back, right tank corner, and to the left front of the tank. The powerhead is slightly power down so that my DHG carpet would get some flow. The problem is that there are a lot of currents in the mid tank section. And a dead spot by the front, right lower corner. I am getting the feeling that the lower, right side of my tank isn't getting enough flow by the substrate. There are tones of debris by that area.

Well, now, I am experimenting something different. I have my XP filter, on the right, back side of the tank, blowing at the right side of the tank glass. This creates a downward action and forcing the water to move from lower right to the left of the tank. I am getting a steadily flow of water current literally on the substrate lower from the right side of the tank to the left side. Of course, I have no mid and top water movement now. So, I pointed my powerhead, which is on the right side of the tank, blowing straight across to the left side. Basically, the powerhead is causing water movements in the mid and top levels of thank. The API XP filter is responsible for moving the water on the substrate level (clockwise position) since it is powerful enough. Anyone seeing any problems with this configuration?

My tank is very, very, very densely planted.
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Old 09-17-2013, 02:22 AM   #2
Diana
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You are doing right to keep working with it. Where you see debris accumulating is a potential problem spot.

You can also use a stick (like a chopstick or something longer) with several threads attached to it to see what the current is doing in different areas of the tank.

When you set up more than one pump (power head, filter...) you want to make sure they are not set to cross each others' path. That would create some turmoil, but then cancel out the flow. A good set up is to think about either a clockwise or anticlockwise pattern and set up all the flows to contribute to that.
More complex is a flow from back to front, like you would have with just one filter, HOB or a can with a spray bar. Then, where do you place the power head?
Another easy one is the Hillstream set up from here:
http://www.loaches.com/articles/hill...-the-fast-lane
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Old 09-17-2013, 02:26 AM   #3
tetra73
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Quote:
Originally Posted by Diana View Post
You are doing right to keep working with it. Where you see debris accumulating is a potential problem spot.

You can also use a stick (like a chopstick or something longer) with several threads attached to it to see what the current is doing in different areas of the tank.

When you set up more than one pump (power head, filter...) you want to make sure they are not set to cross each others' path. That would create some turmoil, but then cancel out the flow. A good set up is to think about either a clockwise or anticlockwise pattern and set up all the flows to contribute to that.
More complex is a flow from back to front, like you would have with just one filter, HOB or a can with a spray bar. Then, where do you place the power head?
Another easy one is the Hillstream set up from here:
http://www.loaches.com/articles/hill...-the-fast-lane
Thanks. I decided to switch to both the filter outlet and the powerhead blowing the same direction. From back right corner, at 45 degree angle, to the front of the glass. Moving to the left in a clockwise position. This way, I would get flow on the DHG carpet while moving the water to the left of the tank. And I pointed the powerhead a bit down to get some water movement over my dead spot.
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