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#1
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Gravity fed skimmer help
I'm considering a skimmer and the no niche skimmer looks interesting. I see
that some of you have this gravity fed (Jan), which suits my needs. But I'm wondering how much suction this will generate and how it is effected by water depth, etc. (Physics lesson required) I will likely have about 3000 gph split between the bottom drain and skimmer. Also I imagine the skimmer should be as far away form the waterfall as possible? How do you deal with the freezing issue since the pipe to the bottom drain will funnel cold air to the bottom drain pipe? I had planned to run the pipe from the skimmer outside of the pond to minimize leakage, but I suppose the inside route might solve the freezing problem. |
#2
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Gravity fed skimmer help
On Fri, 10 Aug 2007 00:27:46 CST, "Bill Stock" wrote:
I'm considering a skimmer and the no niche skimmer looks interesting. I see that some of you have this gravity fed (Jan), which suits my needs. But I'm wondering how much suction this will generate and how it is effected by water depth, etc. (Physics lesson required) I will likely have about 3000 gph split between the bottom drain and skimmer. That should be plenty. I only have half that. We removed edging inside the floating part so the bubble isn't so big. It is really only good, with my gph, to keep the surface clear of small stuff, dust, pollen, bits of leaves. Once in a while I'll find a whole leaf in there. Lots of times the few I get just collect along the outside. With good flow they work really well, just make sure you don't do this U shape design close to the pond edge. People with large koi have had them get stuck between the pot and the sides of their pond. Also I imagine the skimmer should be as far away form the waterfall as possible? How do you deal with the freezing issue since the pipe to the bottom drain will funnel cold air to the bottom drain pipe? I had planned to run the pipe from the skimmer outside of the pond to minimize leakage, but I suppose the inside route might solve the freezing problem. I'm not sure what you're asking. In winter my bottom drain is plugged, and just the skimmer runs. To keep ice away from it I have the stock tank heater next to it. In the lily pond the floating part of the skimmer will be removed as I'm not planning to run that filter all winter. ~ jan ------------ Zone 7a, SE Washington State Ponds: www.jjspond.us |
#3
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Gravity fed skimmer help
"~ jan" wrote in message news On Fri, 10 Aug 2007 00:27:46 CST, "Bill Stock" wrote: Also I imagine the skimmer should be as far away form the waterfall as possible? How do you deal with the freezing issue since the pipe to the bottom drain will funnel cold air to the bottom drain pipe? I had planned to run the pipe from the skimmer outside of the pond to minimize leakage, but I suppose the inside route might solve the freezing problem. I'm not sure what you're asking. In winter my bottom drain is plugged, and just the skimmer runs. To keep ice away from it I have the stock tank heater next to it. I planned to have a vertical pipe outside the pond leading down to the bottom drain pipe. The skimmer pipe would pass through the liner and into the vertical pipe. Since the shutoff valve would be near the filter (i.e. the bottom drain pipe would be full of water) the water in the skimmer pipe would be full to the level of the pond. This would be well above the frost line. Although I believe the flexible PVC is fairly frost resistant. I guess I could install a sonotube at the ponds edge to hose my secondary valve (before the skimmer) and the skimmer down tube. In the lily pond the floating part of the skimmer will be removed as I'm not planning to run that filter all winter. ~ jan ------------ Zone 7a, SE Washington State Ponds: www.jjspond.us |
#4
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Gravity fed skimmer help
On Fri, 10 Aug 2007 21:18:30 CST, "Bill Stock" wrote:
I planned to have a vertical pipe outside the pond leading down to the bottom drain pipe. The skimmer pipe would pass through the liner and into the vertical pipe. This is where people get in trouble with that U I'm talking about. They don't bring the pipe in low enough to accommodate the pot and the floating part at highest level, so they then go down, over, and up as the connection is under the pot. My vertical pipe comes up inside the pond, both my lily pond and the demo pond. This gives secure support to the skimmer. Whereas my koi pond is from the side and under, not so secure, pot sometimes get unlevel, but that's on flex pipe, not hard. So if coming from the side, come in low, then you're only going up. ~ jan ------------ Zone 7a, SE Washington State Ponds: www.jjspond.us |
#5
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Gravity fed skimmer help
"~ jan" wrote in message ... On Fri, 10 Aug 2007 21:18:30 CST, "Bill Stock" wrote: I planned to have a vertical pipe outside the pond leading down to the bottom drain pipe. The skimmer pipe would pass through the liner and into the vertical pipe. This is where people get in trouble with that U I'm talking about. They don't bring the pipe in low enough to accommodate the pot and the floating part at highest level, so they then go down, over, and up as the connection is under the pot. My vertical pipe comes up inside the pond, both my lily pond and the demo pond. This gives secure support to the skimmer. Whereas my koi pond is from the side and under, not so secure, pot sometimes get unlevel, but that's on flex pipe, not hard. So if coming from the side, come in low, then you're only going up. ~ jan ------------ Zone 7a, SE Washington State Ponds: www.jjspond.us Thanks Jan, but how low is low? i.e. how much (minimum) below the water line should the pipe pass through the liner? |
#6
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Gravity fed skimmer help
Thanks Jan, but how low is low? i.e. how much (minimum) below the water line
should the pipe pass through the liner? Measure from elbow at the bottom of pot, to the highest point the float ring might be at. ~ jan ------------ Zone 7a, SE Washington State Ponds: www.jjspond.us |
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