Aeration - more than Dissolved Oxygen levels? - Aquaponic Gardening2024-03-28T23:22:04Zhttps://aquaponicgardening.ning.com/forum/topics/aeration-more-than-dissolved?id=4778851%3ATopic%3A21532&feed=yes&xn_auth=noTrue but you will still deal…tag:aquaponicgardening.ning.com,2012-02-28:4778851:Comment:2997552012-02-28T16:41:17.172ZRyan Chattersonhttps://aquaponicgardening.ning.com/profile/Ryan
True but you will still deal with differences in air flow rates because of friction loss through the length of the pipe (1st stone has less resistance then the furthest. I always use valves and as long as you don't hit the adjustment handles they work great. Also clean all your stones at the same time so the resistance through the stones isnt different.
True but you will still deal with differences in air flow rates because of friction loss through the length of the pipe (1st stone has less resistance then the furthest. I always use valves and as long as you don't hit the adjustment handles they work great. Also clean all your stones at the same time so the resistance through the stones isnt different. Even with valves, every time…tag:aquaponicgardening.ning.com,2012-02-28:4778851:Comment:2996492012-02-28T14:37:09.978Zmatthew ferrellhttps://aquaponicgardening.ning.com/profile/matthewferrell
<p>Even with valves, every time you open one it changes the rest. It is easier(and less frustrating) to have the forethought of where do I really need the air stone to sit?</p>
<p>Even with valves, every time you open one it changes the rest. It is easier(and less frustrating) to have the forethought of where do I really need the air stone to sit?</p> And if you can't do that, you…tag:aquaponicgardening.ning.com,2012-02-28:4778851:Comment:2999102012-02-28T14:34:17.478ZTCLynxhttps://aquaponicgardening.ning.com/profile/TCLynx
<p>And if you can't do that, you then have to put valves everywhere to try to balance it. Really difficult in a sprawling system where you won't be able to see the flow from all the air stones from each valve.<br></br> <br></br> <cite>matthew ferrell said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/aeration-more-than-dissolved?commentId=4778851%3AComment%3A299647&xg_source=msg_com_forum#4778851Comment299647"><div><div class="xg_user_generated"><p>Remember all, if…</p>
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<p>And if you can't do that, you then have to put valves everywhere to try to balance it. Really difficult in a sprawling system where you won't be able to see the flow from all the air stones from each valve.<br/> <br/> <cite>matthew ferrell said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/aeration-more-than-dissolved?commentId=4778851%3AComment%3A299647&xg_source=msg_com_forum#4778851Comment299647"><div><div class="xg_user_generated"><p>Remember all, if plumbed into the same system the shallowest air stone will release the most volume of air. It is best to try and get all stone in the system to the same depth.</p>
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</blockquote> Remember all, if plumbed into…tag:aquaponicgardening.ning.com,2012-02-28:4778851:Comment:2996472012-02-28T14:33:06.141Zmatthew ferrellhttps://aquaponicgardening.ning.com/profile/matthewferrell
<p>Remember all, if plumbed into the same system the shallowest air stone will release the most volume of air. It is best to try and get all stone in the system to the same depth.</p>
<p>Remember all, if plumbed into the same system the shallowest air stone will release the most volume of air. It is best to try and get all stone in the system to the same depth.</p> You should see better results…tag:aquaponicgardening.ning.com,2012-02-28:4778851:Comment:2996462012-02-28T14:29:44.769Zmatthew ferrellhttps://aquaponicgardening.ning.com/profile/matthewferrell
<p>You should see better results with small bubble, not larger. This has to do with surface area. Small bubble surface area>large bubble if volume is head constant. It is the surface of the bubble where diffusion takes place.</p>
<p><br></br> <br></br> <cite>Harold Sukhbir said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/aeration-more-than-dissolved?commentId=4778851%3AComment%3A299735#4778851Comment166802"><div><div class="xg_user_generated"><p>Hi All,</p>
<p>In my…</p>
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<p>You should see better results with small bubble, not larger. This has to do with surface area. Small bubble surface area>large bubble if volume is head constant. It is the surface of the bubble where diffusion takes place.</p>
<p><br/> <br/> <cite>Harold Sukhbir said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/aeration-more-than-dissolved?commentId=4778851%3AComment%3A299735#4778851Comment166802"><div><div class="xg_user_generated"><p>Hi All,</p>
<p>In my small raft i compared grow out time with and without added aeration. From visual observation I estimate between a 20-30% increase in plant size over the same period( this is not weight of plant) using air. By increasing the pore size of the stones i see a sightly better conversion time for nitrification. Do you have the same results?</p>
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</blockquote> I will admit I have not read…tag:aquaponicgardening.ning.com,2012-02-28:4778851:Comment:2997352012-02-28T14:27:32.218Zmatthew ferrellhttps://aquaponicgardening.ning.com/profile/matthewferrell
<p>I will admit I have not read the whole post of comments. Aeration under hydroponic plants has been well documented... for decades. I had to prove this point the other day at work, and pulled out a plant textbook from the 70s with clear pictures just as you have shown. I bet the roots were way more developed too.</p>
<p>I personally think it has to do with the oxygen content of the air being higher than in water. Most of us in aquaponics get away with the levels we do because of flow and…</p>
<p>I will admit I have not read the whole post of comments. Aeration under hydroponic plants has been well documented... for decades. I had to prove this point the other day at work, and pulled out a plant textbook from the 70s with clear pictures just as you have shown. I bet the roots were way more developed too.</p>
<p>I personally think it has to do with the oxygen content of the air being higher than in water. Most of us in aquaponics get away with the levels we do because of flow and drain media beds, or nft and towers having low flow high air space, of the vigorous aeration needed to keep the fish alive.<br/><br/>The key for your raft system is to not over do it. You don't want the aeration to come up through the pots, leading to your plants sitting in a puddle. Anything below this should help out greatly.<br/><br/></p> This is getting exciting!tag:aquaponicgardening.ning.com,2011-07-31:4778851:Comment:1673072011-07-31T17:49:42.602ZEllen Roelofshttps://aquaponicgardening.ning.com/profile/EllenRoelofs
This is getting exciting!
This is getting exciting! I need to do some calculation…tag:aquaponicgardening.ning.com,2011-07-31:4778851:Comment:1663752011-07-31T14:51:45.438ZFrank De Block-Burij (hygicell)https://aquaponicgardening.ning.com/profile/FrankDeBlockBurij
<p>I need to do some calculations, then I will reveal my solution<br></br>Frank<br></br> <cite>TCLynx said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/aeration-more-than-dissolved?commentId=4778851%3AComment%3A167009&xg_source=msg_com_forum#4778851Comment167009"><div><p>So Frank, I can agree that for aerating a fish tank, water flow can be designed to be enough.</p>
<p> </p>
<p>However, with only 5 gpm of water flow through a raft bed and a long run under rafts How do…</p>
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<p>I need to do some calculations, then I will reveal my solution<br/>Frank<br/> <cite>TCLynx said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/aeration-more-than-dissolved?commentId=4778851%3AComment%3A167009&xg_source=msg_com_forum#4778851Comment167009"><div><p>So Frank, I can agree that for aerating a fish tank, water flow can be designed to be enough.</p>
<p> </p>
<p>However, with only 5 gpm of water flow through a raft bed and a long run under rafts How do you make the water flow provide all the needed aeration for the rafts down their entire length (which can often be hundreds of feet since raft beds are often chained together.)</p>
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</blockquote> So Frank, I can agree that fo…tag:aquaponicgardening.ning.com,2011-07-31:4778851:Comment:1670092011-07-31T13:15:11.963ZTCLynxhttps://aquaponicgardening.ning.com/profile/TCLynx
<p>So Frank, I can agree that for aerating a fish tank, water flow can be designed to be enough.</p>
<p> </p>
<p>However, with only 5 gpm of water flow through a raft bed and a long run under rafts How do you make the water flow provide all the needed aeration for the rafts down their entire length (which can often be hundreds of feet since raft beds are often chained together.)</p>
<p>So Frank, I can agree that for aerating a fish tank, water flow can be designed to be enough.</p>
<p> </p>
<p>However, with only 5 gpm of water flow through a raft bed and a long run under rafts How do you make the water flow provide all the needed aeration for the rafts down their entire length (which can often be hundreds of feet since raft beds are often chained together.)</p> what I meant is that due to t…tag:aquaponicgardening.ning.com,2011-07-31:4778851:Comment:1666462011-07-31T07:42:53.547ZFrank De Block-Burij (hygicell)https://aquaponicgardening.ning.com/profile/FrankDeBlockBurij
<p>what I meant is that due to the compressability of air (a gas) your compressor or blower or air pump is necessarily strangled.</p>
<p>So quite a big part of the energy is transformed into noise, wear and heat</p>
<p>in a good design there is no necessity to strangle a water pump: just pump the water straight up to the necessary height, using a wide tube on the pump exit then let it free flow to wherever you need, preferably in open (but shaded) gutters with turbulent flow (just put some…</p>
<p>what I meant is that due to the compressability of air (a gas) your compressor or blower or air pump is necessarily strangled.</p>
<p>So quite a big part of the energy is transformed into noise, wear and heat</p>
<p>in a good design there is no necessity to strangle a water pump: just pump the water straight up to the necessary height, using a wide tube on the pump exit then let it free flow to wherever you need, preferably in open (but shaded) gutters with turbulent flow (just put some stones or other in the gutters to make the water swirl).</p>
<p>You can then put valves (metering and/or controlled on/off valves) on all exits except one (preferably the one going back to the fish tank): your pump will always give it's maximum volume for the energy input.</p>
<p>the surplus water will go freely back to the fish tank,</p>
<p>we agreed that volume is what we need:</p>
<p>for fast evacuation of solids and bacteria out of the fish tank to the biofilter, for maximum nitrification and for maximum aeration</p>
<p>surface exposure and oxygen exchange will be optimal</p>
<p>Frank</p>