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Jon Cavin
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NFT flow rates
Started this discussion. Last reply by TCLynx Aug 6, 2010. 3 Replies 0 Likes
There have been many discussions with regards to height of water in the channels, pitch, flow rates, etc. I am wondering if anyone has any different success stories, including length of tubes,…Continue
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TCLynx replied to Jon Cavin's discussion NFT flow rates"A comment about NFT and solids. When I first hooked up a bit of NFT pipe, I was feeding it water directly from the fish tank. The system was fairly heavily stocked. It did not take very long before the solids were clumping up around the plant roots…"
Nate Storey replied to Jon Cavin's discussion NFT flow rates"Hi Jon,
I've done a bit of NFT in previous aquaponics systems and have had good luck with them. I've used flat bottomed PVC gutter and inclined it at around 5 degrees pitch. (most commercial hydro NFT systems run at 5 degrees or less- many…"
TCLynx replied to Jon Cavin's discussion NFT flow rates"I've only got two 15 foot lengths of NFT pipes. Mine are actually round pipes and not proper NFT channels. I don't have much pitch in mine and I'm sure there is usually between 1/2" and 1/4" of water in the bottom. I…"
Jon Cavin replied to M Cosmo's discussion Vertigro and media in the group Vertical Aquaponics"Any pictures? Are there questions or just reporting as to status? Sounds cool."
Jon Cavin posted a discussionNFT flow rates
There have been many discussions with regards to height of water in the channels, pitch, flow rates, etc. I am wondering if anyone has any different success stories, including length of tubes, number of plants per tube and ofcourse the importance of aeration. I am currently using a 1/4 hp pump going up 6 ft feeding 9 individul tubes. My flow rates seem good to me but I am basing that on virtually nothing. My water depth in the tubes is approximately 1/4" maybe a little more. The tubes are…See More
Nate Storey replied to Jon Cavin's discussion Pressurized solids filtration in the group Vertical Aquaponics"Hmm. Not sure. I take it it's a pressurized bead filter of some sort? It's possible if it is a pressurized bead-type filter that you are simply moving too little volume. Another possiblity is that the "solids" you see acumulating…"
TCLynx replied to Jon Cavin's discussion Pressurized solids filtration in the group Vertical Aquaponics"Cleaning the tubes after each harvest is probably a good idea. Sorry I don't have a better model to recommend."
Jon Cavin replied to Jon Cavin's discussion Pressurized solids filtration in the group Vertical Aquaponics"We reomved the biological filtration but left in the mechanical which is substantial. They include three different grade mesh filters, a swirl filter at the bottom and a screen at the top. To that we added the gravel after noticing too many solide…"
TCLynx replied to Jon Cavin's discussion Pressurized solids filtration in the group Vertical Aquaponics"Hum, I don't quite understand. You removed the bio-filtration from the filter on arrival? And you put gravel in instead? and you are wondering why it isn't working so well? Those pressurized filters are different than gravel beds, I'm…"
Jon Cavin added a discussion to the group Vertical Aquaponics
Pressurized solids filtration
We are using a Little Giant mechanical filter rated for 1,500 gallons and it is only filtering a 100 gallon tank with about 20 fish. Still getting too many solids in the NFT tubes. Since we removed the bio filtration from the filter on arrival, we added some gravel in to aid in the filtration. Anyone using any other method of solids filtration. Needs to be able to handle 10psi. Picture of what we are using is attached.
Jon Cavin left a comment for Sylvia Bernstein"Just posted a few pics of two of our systems. Thanks."
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- At 1:04pm on May 3, 2010,
Sylvia Bernstein said… - Hi Jon,
Thanks for joining the Aquaponic Gardening community! I hope you find it a fun place to explore aquaponics. There is a real blend of experienced and new aquapons in this community, so please don’t hesitate to join in. Always thrilled to have experienced growers join us – please post some photos of your system!
If you are interested in a forum or blog topic, but don’t want to join in right away, just check the “follow” box to be notified whenever there is activity on that subject.
We have just one rule - keep it cordial (no flaming!).
Thanks again for joining us, and I look forward to getting to know you.
Sylvia
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