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#1
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aeration
I have a small 200 gph pump (very low power usage) submerged in my pond for
additional aeration - just as added 'insurance'. The output is below the water so the water is just 'bubbling' like a natural spring might. I do not want it splashing for several reasons. I have been told it is the breaking of the surface which helps to oxidize the water. Questions: 1) Is this actually doing me some good. 2)Aesthetics aside would an airstone attached be significantly better. Thanxx Bill Brister - Austin, Texas |
#2
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aeration
Bill,
If you are worried about "aesthetics" and airstone pumping air into your water from the bottom of your pond would probably be a better idea, especially as the summer is coming on and higher pond temps, especially in Austin, Texas. The airstone in the depths of your pond would allow a lot more "air" to come in contact with the water than just moving it up and and across the surface using the pump. Tom L.L. ---------------------------------------------- Newbie Bill wrote: I have a small 200 gph pump (very low power usage) submerged in my pond for additional aeration - just as added 'insurance'. The output is below the water so the water is just 'bubbling' like a natural spring might. I do not want it splashing for several reasons. I have been told it is the breaking of the surface which helps to oxidize the water. Questions: 1) Is this actually doing me some good. 2)Aesthetics aside would an airstone attached be significantly better. Thanxx Bill Brister - Austin, Texas |
#3
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aeration
"Tom L. La Bron" wrote in message ... Bill, If you are worried about "aesthetics" and airstone pumping air into your water from the bottom of your pond would probably be a better idea, especially as the summer is coming on and higher pond temps, especially in Austin, Texas. The airstone in the depths of your pond would allow a lot more "air" to come in contact with the water than just moving it up and and across the surface using the pump. Tom L.L. ---------------------------------------------- Newbie Bill wrote: I have a small 200 gph pump (very low power usage) submerged in my pond for additional aeration - just as added 'insurance'. The output is below the water so the water is just 'bubbling' like a natural spring might. I do not want it splashing for several reasons. I have been told it is the breaking of the surface which helps to oxidize the water. Questions: 1) Is this actually doing me some good. 2)Aesthetics aside would an airstone attached be significantly better. Thanxx Bill Brister - Austin, Texas Actually, the air water interface is at least as important, if not more important. The larger the surface area of the air/water interface, the greater the exchange of gases. While an airstone can pump air through the water, it does so in a limited way, since it is only making contact with a small area of water at a time and only influences the immediate area around the airstone. By inducing a current across the surface of the water with a pump located at the bottom of the pond, you will induce more gas exchange because of the greater surface area involved. It also helps in preventing zonation from froming in the water column, since you are pumping the water from the bottom and streaming it across the surface, which in turn, allows oxygenated water to move towards the bottom of the pond. The ripples going across the surface of the pond also looks nice. |
#4
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aeration
"Newbie Bill" wrote in message
m... I have a small 200 gph pump (very low power usage) submerged in my pond for additional aeration - just as added 'insurance'. The output is below the water so the water is just 'bubbling' like a natural spring might. I do not want it splashing for several reasons. I have been told it is the breaking of the surface which helps to oxidize the water. Questions: 1) Is this actually doing me some good. 2)Aesthetics aside would an airstone attached be significantly better. Thanxx Bill Brister - Austin, Texas Try making a venturi out of pvc. This will give you the circulation benefit of the pump with more aeration than an airstone. You can also make it for a couple of bucks, so it's cheap to try. Basically, your pump output goes into a piece of horizontal 1/2" pvc a couple of feet long. Cut the pvc in half and add a T with the opening pointing straight up. Get another piece of pvc long enough to fit in the T and stick a couple inches out of the water. Cut one end at a 45 degree angle and shave the pvc so it will fit past the stop in the T. It needs to get down into the T and get into the flow coming from the pump, with the open angle away from the pump. The water flow sucks air in from the upright pvc and bubbles out of the lower pipe. Here's a possibly better explanation, with a different method. With a small pump, I'd stick with 1/2" pvc and shaving the pvc may be easier than finding tubing that will fit inside the 1/2" pvc. http://spaghoops.com/pond/venturi.htm I'm also in Austin btw. My fish love playing in the bubbles, although I've got a 1600 gph pump on the venturi which gives them a pretty good current to play in. |
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