Aufin

iAVs in Florida

68 posts in this topic

Hi Aufin,

The likely explanation is that the algae (the most visible aspect of the detritus layer) has died off due to being shaded by the plants in the larger bed.  This is what happens.  

So long as you don't disturb the sand in the bottom of the furrow, the water still still run out along its length - just as before.

Gary

Share this post


Link to post
Share on other sites
31 minutes ago, GaryD said:

Hi Aufin,

The likely explanation is that the algae (the most visible aspect of the detritus layer) has died off due to being shaded by the plants in the larger bed.  This is what happens.  

So long as you don't disturb the sand in the bottom of the furrow, the water still still run out along its length - just as before.

Gary

Well, the water not flowing the full length as it did with a really nice detritus filled furrow is what first got my attention.  Doesn't seem the water flow is carrying the stuff I need to be deposited along the furrow.  I know it is, tho because the other biofilters have nice little poop-filled furrows.  With the weather shifting slightly I'll uncover the bed and see what happens. 

Any progress on your iAVs beds? 

TheDictator likes this

Share this post


Link to post
Share on other sites

Hi Aufin,

Was wondering if you have an update on your system and the issue with the lack of deposits in the furrows. 

Also, I was considering using one of those 4" toilet flanges to make the drain connection. Think that would work? I'd screw it to the end over the plastic, with some sealant underneath (against the plastic) and then cut the hole through the plastic when it's in place. Now though, I'm wondering about 2 or 3 drains, like you suggested...

Jeff

Share this post


Link to post
Share on other sites
7 hours ago, JeffH said:

Hi Aufin,

Was wondering if you have an update on your system and the issue with the lack of deposits in the furrows.

This is what they look like right now.  Have seeds just starting off in the large bed.

Also, I was considering using one of those 4" toilet flanges to make the drain connection. Think that would work? I'd screw it to the end over the plastic, with some sealant underneath (against the plastic) and then cut the hole through the plastic when it's in place. Now though, I'm wondering about 2 or 3 drains, like you suggested...

Jeff

Don't know about the toilet flange.  A threaded pvc galvanize to pvc converterm piece should work fine in any size you can find and feel comfortable with as long as you use the converters on both ends of the galvanized nipple going through the wood frame.  Use plenty of sealant on both piecs.  2 inch seems to work just fine for my beds.  3 or 4 inch if it makes you feel better.  Or multiple drains if the only hardware you can find is in a small pipe size.  Doesn't seem to matter how fast everything drains as long as it drains.  Your sand will be the major determining factor there.

As to the furrow deposits, it doesn't seem to be making a lot of difference.  The FT gunk is still getting into the sand and plants.  Have no idea why it doesn't build up, although the furrows do have a crusty surface.  I'll know more as thinges progress with the new fall vegs.  One thing I did, tho, is add another water supply to the large bed.  I now feed water to both ends to make sure everything is watered/fed.  

Gary, please correct me if I'm wrong.

20161008_103246-720x1280.jpg

20161008_103252-720x1280.jpg

20161010_184735-1024x576.jpg

Share this post


Link to post
Share on other sites

So did you add the second water supply (other end) to the main bed because the water wasn't flowing all the way down the furrows? I've been wondering about that and if it is just a matter of adjusting the rate of flow. I remember reading on the iAVs site that the water might not initially flow all the way down until a crust had formed. But you obviously have that already. Was the water still not making it all the way down?

Share this post


Link to post
Share on other sites

For some reason, after my additional smaller beds came online, the schmutzdeke (sp?) In the large bed started disapearing although I have good buildup in the smaller beds.  The furrows still have a light crust, but not as heavy as I'm happy about.  Maybe because I lost some fish (my fault), I don't know.  But, everything still seems to be chugging along.  The second supply line is mainly for my comfort level.  Rain storms also washed my hills down a bit and washed the sand into the furrows.  

Share this post


Link to post
Share on other sites
9 hours ago, Aufin said:

For some reason, after my additional smaller beds came online, the schmutzdeke (sp?) In the large bed started disapearing although I have good buildup in the smaller beds.  The furrows still have a light crust, but not as heavy as I'm happy about.  Maybe because I lost some fish (my fault), I don't know.  But, everything still seems to be chugging along.  The second supply line is mainly for my comfort level.  Rain storms also washed my hills down a bit and washed the sand into the furrows.

 

 

Our students discovered the same situation. Unless if all the beds are the same, then distribution is a problem. So reviewing again the instructions that Dr Mark stated they saw their mistake. What he used, and explains how to distribute the effluent evenly into the furrows can also be used the length of the furrows, problem solved.

Aufin, the students wanted me to tell you that what they see of the plant growth in your iAVs system is some of the best pictures they've seen to date.

But they wanted to say about your rain washing the furrows, think of using some plastic underneath the shade cloth, it works for them.

Share this post


Link to post
Share on other sites

I was thinking it might be a distribution issue, but don't know how to solve it.  Large bed is fed from a t fitting in the main supply line.  2 smaller beds are at the end of the line.  Guess the "stuff" just blows by the corner going into the large bed.  

Tell ur students thanks.  Using a simple Samsung S5 phone camera.

I have a hard plastic roof covering both beds.  Pretty high, tho so the rain blows in from the sides.  Probably higher than necessary, but didn't want to cramp anything that might want to grow up 6 feet.

20161008_161019-1280x720.jpg

bigdaddy likes this

Share this post


Link to post
Share on other sites
3 hours ago, Old Prospector said:

Our students discovered the same situation. Unless if all the beds are the same, then distribution is a problem. So reviewing again the instructions that Dr Mark stated they saw their mistake. What he used, and explains how to distribute the effluent evenly into the furrows can also be used the length of the furrows, problem solved.

Seems I might learn something from your students.

Share this post


Link to post
Share on other sites

Newest iAVs on its way.  B&S-in-law have been intrigued by the whole AP thing.  Been watching mine pretty close since I converted to iAVs.  Finally pulled the trigger and started building their own.  Yowza....  4 beds 10' x 2'.  

 

 

20161013_140826-1024x576.jpg

ande, GaryD and bigdaddy like this

Share this post


Link to post
Share on other sites
On 18 September 2016 at 3:31 AM, Aufin said:

Have a situation I don't have any ideas as to why:  the detritus layers in the furrows in the larger sand bed/filter have gone away and aren't forming any more since I put in the two smaller beds.  Both beds are fed by the same pump and supply line, so I don't understand what's happening.  The smaller beds supply lines are throttled back to maybe 60% flow, so there's pressure backup to feed the large bed.  Can't imagine everything just blowing by the line to the large bed.  Small beds have plants in them and the detritus furrows seem to be doing just fine, so turning them off for a while isn't an option.  Changed the supply manifold a little to not have so much turbulence coming out of the line and scouring the sand.......made no difference.  As much as I don't want to, I'm about ready to add another pump and supply dedicated to the large bed. 

Hi Aufin,

I've spoken to Mark about your situation and here are our thoughts:

  • The water flow rates to....and the dynamics of the movement of the solides to your various beds.....are the most likely explanation for a preponderance of solids in one bed over others.   If it bothers you, put individual pumps into your fish tank for each of your your various beds....sized to match the beds.  This will ensure that each bed is getting a proportionate share of everything.  It's also a useful redundancy measure.
  • Every organism has waste products which eventually build up and inhibit its development.  There are many dynamics at play here.  The only stability that applies within an iAVs is in the growth of the fish and the plants.....the micro-organisms, however, in a state of constant change......of waxing and waning.
  • The fact that the water does not travel the full length of the furrows does not mean that the plants along that entire furrow are not getting their fair share of water or nutrients.  By the end of each flood cycle, the bed is saturated and the furrows are full of water.....so the water and nutrient needs of the plants are being met.

At the end of day, the best way (short of having access to a laboratory) to determine the overall health of your system is to observe your fish and plants.  Are your plants or fish suffering?  Is there any evidence of nutritional deficiencies?  If not, everything's probably fine.....and the various visible changes that occur in your system are evidence of the self-managing soil microbiology at work.....and can be viewed with interest rather than alarm.

Gary

 

Share this post


Link to post
Share on other sites
On 14 October 2016 at 7:21 AM, Aufin said:

Newest iAVs on its way.  B&S-in-law have been intrigued by the whole AP thing.  Been watching mine pretty close since I converted to iAVs.  Finally pulled the trigger and started building their own.  Yowza....  4 beds 10' x 2'.  

 

 

20161013_140826-1024x576.jpg

Great.  Another convert to the dark side.  We're on the ascent.

Share this post


Link to post
Share on other sites
14 hours ago, GaryD said:

Hi Aufin,

I've spoken to Mark about your situation and here are our thoughts:

  • The water flow rates to....and the dynamics of the movement of the solides to your various beds.....are the most likely explanation for a preponderance of solids in one bed over others.   If it bothers you, put individual pumps into your fish tank for each of your your various beds....sized to match the beds.  This will ensure that each bed is getting a proportionate share of everything.  It's also a useful redundancy measure.  A second pump is starting to get away from one of the attractions of iAVs. I prefer to stay as true to Mark's original basic idea as I can.  Going to reconfigure the way the water is divided.  Instead of having the supply to one bed set up as  "side street" coming off the T, I will set the T as an end where the water must go either left or right. 
  • Every organism has waste products which eventually build up and inhibit its development.  There are many dynamics at play here.  The only stability that applies within an iAVs is in the growth of the fish and the plants.....the micro-organisms, however, in a state of constant change......of waxing and waning. Waxing?!  Bikini wax? Aren't they too busy for such foolishness?  Waning?  What do they have to whine about?    Nevermind ..... Saturday morning with nothing better to do.
  • The fact that the water does not travel the full length of the furrows does not mean that the plants along that entire furrow are not getting their fair share of water or nutrients.  By the end of each flood cycle, the bed is saturated and the furrows are full of water.....so the water and nutrient needs of the plants are being met.

At the end of day, the best way (short of having access to a laboratory) to determine the overall health of your system is to observe your fish and plants.  Are your plants or fish suffering? Nope.  Fish seem happy as if they had good sense.  Is there any evidence of nutritional deficiencies?  Not that I can tell.  Bugs sure like them. If not, everything's probably fine.....and the various visible changes that occur in your system are evidence of the self-managing soil microbiology at work.....and can be viewed with interest rather than alarm.  Yep.  In the AM, enjoy my coffee, feed the fish, watch everything grow.  Pm, same dance ....... with a cold one. 

Gary

 

 

bigdaddy and Ravnis like this

Share this post


Link to post
Share on other sites

Hi Aufin,

Was wondering what pump(s) you are using for your system. I hadn't put much thought into the fact that they need to move some solids in my system and suddenly am wondering if my pump (EcoPlus 728320 Eco 1056 Submersible Pump, 1083GPH https://www.amazon.com/gp/product/B0012V3Q2U/ref=oh_aui_detailpage_o02_s02?ie=UTF8&psc=1) will do the job. This pump supports an inline installation, which is what I intend to do so it won't be using the filter guard. Thoughts?

Jeff

Share this post


Link to post
Share on other sites
58 minutes ago, JeffH said:

Hi Aufin,

Was wondering what pump(s) you are using for your system. I hadn't put much thought into the fact that they need to move some solids in my system and suddenly am wondering if my pump (EcoPlus 728320 Eco 1056 Submersible Pump, 1083GPH https://www.amazon.com/gp/product/B0012V3Q2U/ref=oh_aui_detailpage_o02_s02?ie=UTF8&psc=1) will do the job. This pump supports an inline installation, which is what I intend to do so it won't be using the filter guard. Thoughts?

Jeff

This is the pump I'm using.  https://www.amazon.com/gp/product/B000FKDLBU/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0007Q3RQ6&linkCode=as2&tag=dril-20  

Made a cage with 1/4" hardware cloth to keep out trash, small fish and anything else that might clog.  

Share this post


Link to post
Share on other sites

Been doing a little cleanup of the beds getting ready for new plants.  Started pulling tomatoes that weren't looking very healthy and look what I found ............ I think I have been invaded by nematodes.  Any second opinions?  Any ideas as to how to get rid of nematodes without killing everything?  Pretty sure all my beds have been invaded by these nasty critters.  Needless to say, I'm not very happy.

 

20170312_124517.jpg

20170312_124835.jpg

20170312_124840.jpg

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now