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Vlad Jovanovic's Discussions

Bad Batch of Plant !t Media (LECA)

Started this discussion. Last reply by Jeff S 7 hours ago. 16 Replies

Ok, so after using about 70, 45 liter bags of LECA (Lightweight Expanded Clay Aggregate) made by a few different companies, I've finally ran into bad batch.Since early spring of this year, we've used…Continue

Tags: Plant!t, pH, hydroton, LECA

Choosing an appropriate variety among cultivars

Started this discussion. Last reply by Jeffrey Ihara May 22, 2013. 13 Replies

I'm a big fan of brassicas. Especially the Japanese and Chinese types. Most all common economically significant (meaning grown as food crops) brassicas are pretty much known for being pretty reliable…Continue

Plant Growth and System Cycling

Started this discussion. Last reply by Vlad Jovanovic Feb 24, 2013. 8 Replies

These pictures are from a system that I am cycling. The water's pH is 8.2-8.5. The seedlings are less than two weeks old and have received nothing but system water. It's been cold and foggy here for…Continue

Tags: plants, cycling, seedlings, pH

GMO's may have led to increased pesticide/herbicide usage

Started this discussion. Last reply by Vlad Jovanovic Sep 26. 49 Replies

Found this article kind of interesting...…Continue

 

Vlad Jovanovic's Page

Latest Activity

Jeff S replied to Vlad Jovanovic's discussion Bad Batch of Plant !t Media (LECA)
"Thanks Vlad. I'm setting up a new GB and am going to use lava rock for a base media and top it with hydroton. I have year old GB that has always run around 7.2-7.5pH. I'm thinking about transferring some of the Growstone in that bed to see…"
7 hours ago

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Vlad Jovanovic replied to Vlad Jovanovic's discussion Bad Batch of Plant !t Media (LECA)
"It doesn't matter, the color of the vinegar...you can use any type of acid (doesn't have to be vinegar, it's just that vinegar happens to be what most folks have on hand) to test your media for limestone (CaCo3). You're looking…"
9 hours ago
Jeff S replied to Vlad Jovanovic's discussion Bad Batch of Plant !t Media (LECA)
"I've heard of a media test with vinegar and was wondering if you use white or dark vinegar and what reaction are you looking for?"
10 hours ago

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Vlad Jovanovic commented on Rob Nash's photo
Thumbnail

12 x 15 greenhouse

"As always...Great job Rob!"
17 hours ago

Moderator
Vlad Jovanovic replied to Andrew Chapman's discussion Any results yet?
"Hi Andrew, I'm a bit crunched for time at the moment but basically i ended up going with 5-6grams of Epsom salt (which is 9.98% Mg) per liter of humonia. There are some explanations (measurements, drying time, simple struvite reactor, etc)...…"
yesterday
uri sitnik left a comment for Vlad Jovanovic
"hi Vlad i have read all your posts',and it is as reading my own Thoughts. six mounth ago i left my job trying to do things that i like (carpentry, pottry, etc) creating for my soul, and AP system to fead me.feelig that small comertial AP…"
yesterday

Moderator
Vlad Jovanovic replied to Andrew Chapman's discussion Any results yet?
"No problemo...yes, If I recall the struvite averaged out to be about what I thought it would (roughly) 5-7 N 24-30 P 0- K and 9-12 Mg P as PO4 and N as NH3"
Thursday

Moderator
Vlad Jovanovic replied to Eddy Ruhle's discussion Caterpillar destroy my cucumber
"Hi Eddy, from the looks of it (and the fact that it's eating your cucumber plant)...I would say that is Diaphania hyalinata. http://entnemdept.ufl.edu/creatures/veg/leaf/melonworm.htm Colloquially referred to as the "melonworm" (and…"
Thursday

Moderator
Vlad Jovanovic replied to Kip Thomas's discussion Chloramines
"Thanks Jessie :)"
Wednesday
Butch Pornebo replied to Vlad Jovanovic's discussion Pee-Ponics Flowering - Struvite in the group Fish-less Systems
"as usual your insights and expertise is highly appreciated."
Wednesday

Moderator
Vlad Jovanovic replied to Kip Thomas's discussion Chloramines
"Hi Jessica, I was wondering...since the ascorbic acid essentially breaks apart the chloramine into its component parts...that being being ammonia and chlorine (which then easily off-gasses)... have you by chance tested your water for ammonia after…"
Wednesday

Moderator
Vlad Jovanovic replied to Vlad Jovanovic's discussion Pee-Ponics Flowering - Struvite in the group Fish-less Systems
"No, doing that should not damage your system in any way. It's been done in both fishless as well as in systems with fish in them. "
Wednesday

Moderator
Vlad Jovanovic replied to Vlad Jovanovic's discussion Humonia and Struvite
"A "box of rocks" would be cheap. Since you wouldn't have solids to deal with you could go with smaller sized rocks than would be typical for AP (they still need to be pH neutral, so no CaCO3 (limestone) containing rocks. "
Wednesday

Moderator
Vlad Jovanovic replied to Andrew Chapman's discussion Any results yet?
"Hi Andrew, could you please elucidate, or put into context what statement of mine was exactly referring to? As of the beginning of this year's growing season until now alone, I've had about a dozen leaf tissue analyses, half a dozen or so…"
Wednesday
Butch Pornebo replied to Vlad Jovanovic's discussion Pee-Ponics Flowering - Struvite in the group Fish-less Systems
"since I'm doing fishless, I was contemplating on hanging an appropriate amount of worm casting in a bag and HANG it inside the fish tank as opposed to brewing a tea in a separate 5 gallon bucket. in this case the whole system is treated. do you…"
Tuesday
Joni Solis replied to Vlad Jovanovic's discussion Humonia and Struvite
"So Vlad, can you point me in the right direction as to what is the best kind of bio-filter to use for pee water. A bio-filter that would be cheap to make would be the best for me right now. Thank you for your help. "
Monday

Profile Information

How did you find us?
Search engine (Google)
If you found us through a search engine, what search words were you using?
Aquaponics
Are you an aquaponic gardener already?
Yes
If so, what type of system? (pick all that apply)
flood and drain media, raft, combination
How old is your system?
2 yrs or more
What type of fish do you grow with? (select all that apply)
Other
How big is your fish tank?
4,850 litre
Name a part of a fish (spam blocking question)
Hepatic portal vein
Please tell us something else about yourself.
2131 sq.foot AP Greenhouse completed fall of 2011. Have 8 IBC media beds for growing as well as pre-filtering the DWC troughs. 4,850 litre fish tank, 2000+ litre sump buried in the ground. 546 sq. feet of DWC rafts. Using Carp as it is very tolerable to conditions here, and is also the single most bought/sold/eaten fish in these parts.

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Vlad Jovanovic's Blog

How To Get What You Want

Posted on November 25, 2012 at 6:47am 9 Comments

What do you want most in all the world? More money, a new car stereo, a vacation? To lose ten pounds, to get home from work in time to see your favorite sitcom? Or is it something more than that, something harder to define?

Maybe you've given up on ever realizing your true dreams, and you settle for smaller things because they, at least, seem possible. Maybe it never occured to you to ask yourself if the goals you've been pursuing really are what you want…

Continue

Food for Thought

Posted on September 22, 2012 at 5:18am 4 Comments

Here's an exercise to try at home. You will need a working stopwatch, or another timepiece that measures seconds. Before you begin, seat yourself in a comfortable chair and loosen your clothing.

Watch the second hand as it passes around the face of the clock. Picture the moment of your death, perhaps many decades in the future, or perhaps only a few years or months (who can know?). Wait for the second hand to reach the starting point at the top of the…

Continue

Time Well Spent

Posted on August 1, 2012 at 3:00am 4 Comments

Well it seems like I’ve been having the same/similar conversation here in the village with a lot of folks lately that goes something like this…

 

“Gee Vlad how did you know dot…dot…dot…”

 

“Well, I read it in a good book/study on the topic” (and if applicable, tried it out to see for myself).

 

“Ooh, I don’t have time to read”!

           

“Do you watch T.V”

 

“Yeah, who doesn’t”?

 

            “Well, if you…

Continue

Speeding Up Seed Germination

Posted on May 27, 2012 at 5:01am 9 Comments

Just because I said in some thread or another, that I would follow up on my results, here it is. The deal is...

I love hot peppers, but hate how long it takes for certain seeds to germinate (sometimes over 2 weeks). This often results in a lot of nail biting, and constant checking moisture levels, temps etc...So the thinking here was that many varieties of hot peppers evolved and proliferated mainly due to birds. Birds, not having taste buds that react to the capsaicinoids that…

Continue

Comment Wall (30 comments)

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At 8:50am on November 21, 2014, uri sitnik said…

hi Vlad

i have read all your posts',and it is as reading my own Thoughts.

six mounth ago i left my job trying to do things that i like (carpentry, pottry, etc)

creating for my soul,

and AP system to fead me.feelig that small comertial AP can provide some small income to make me go around .

and today i have come across your post ,and your picters and i can see you are doing AP comertial (corect me if iam mistaken)  i would like to ask you for some of your Know how if you are willing to shere

thank you  uri

At 3:54am on January 12, 2014, Carey Ma said…

Hi Vlad, long time no talk. How and what are you doing these days? How is your operation going? I have had a pretty busy and exciting year building a new farm. One thing I'd like to share is my use of charcoal as media in my fishless system and in raised beds. What do you think about this, off the top of your head? I'm interested in your opinion.

Hope everything is well and you enjoyed a warm holiday season surrounded by friends and family.

Cheers

At 1:32pm on November 6, 2013,
Moderator
Alex Veidel
said…
Whoa, is that activity??? Welcome back Vlad!! Thanks, I hope to have a good time :)
At 1:19pm on September 23, 2013,
Moderator
Alex Veidel
said…

You know, there's an entire side of your face that I never knew existed....until this weekend O_o

At 5:09am on March 26, 2013, Ivan Djurickovic said…

Cao,

bolje vas nasao!

Ja sam totalni pocetnik u akvaponici, trenutno gradim svoj prvi sistem i ucim ucim ucim o svemu ovome :D

Pozdrav!

At 9:23am on February 24, 2013, Bob Campbell said…

This is a section of an essay I'm writing about soil.  The very last sentence describes how the pH is kept in check during the nitrification process. 

I'd like to
   1.  more accurately describe both the nitrification chemistry math of NH4+ conversion to NO2- and NO3-
as well as the
    2. denitrification math involving the hydrogen and oxygen from the NO2 and NO3- in which the N2 is returned to the atmosphere through denitrifying bacteria.

    3. It also seems that the plant exchange of H+ for nitrogen would help the soil retain a higher pH.  Can you help me verify that, and the correct symbol for the form of nitrogen being exchaged?

Maybe a new discussion would be best, but I wanted to specifically ask for your help so I posted my question here.







Bacteria come in two basic types.  Anaerobic which lives without oxygen and produces offensive odors, and aerobic which lives with oxygen and produces pleasant fresh odors.  Bacteria are responsible for recycling carbon, sulfur, and nitrogen.  CO2 is a by product of aerobic bacteria, and sulfur is recycled by anaerobic bacteria.  Nitrogen found in the atmosphere can not be used directly by plants. It must be 'fixed' through a process called nitrification where aerobic bacteria combine nitrogen with either oxygen or hydrogen
to form  nitrite (NO2-), and eventually nitrate (NO3-) ions from the ammonium (NH4+) waste of protozoa and nematodes which consume other bacteria and fungi.  Nitrification produces an acidic pH when oxidation occurs. This process is called reduction because there is a loss of electrons, and it releases energy that is used by the bacteria.   Nitrifying bacteria do not generally like low pH, but fortunately other bacteria called denitrifying bacteria convert nitrogen salts created by the nitrification process back into nitrogen N2 which returns to the atmosphere.
The plants exchange hydrogen (H+) for nitrogen (N?) which also helps to return the pH to a higher level.



At 3:00pm on January 30, 2013, Ilija Aralica said…

Hvala Vlado !

At 9:14am on January 26, 2013, Izzy said…

Hey buddy, thanks for the add!  Talk to you soon.  :-)

At 8:53am on December 7, 2012,
Moderator
Alex Veidel
said…

My tilapia are coming in a half hour. 10:30am Central Time. Yeah, I wasn't sure if the website actually hosted the videos like it does the pictures, or if it just linked to them, so I tried to upload straight from my computer. Anyway, it won't let me delete the video, at least, not that I can tell. Kinda embarrassing :) I'll load it up to youtube, its just the video version of my pictures.

At 11:41am on November 14, 2012, Tiffany Taylor said…

Lol well thanks for accepting the request!!!! Yes of course I can tell you anything you wanna know about our program. We have a website www.belovedcommunitychicago.org which is currently being updated so the new website will be www.thebelovedcommunitychicago.org. Our urban farm project went from a small summer project to a year round thing lol so we are trying to put up all of the info/pics of the work that the kids have done throughout the summer and fall. I can gladly email some photos of the urban farm if you'd like. The kids are really excited about the aquaponics system they are anxious to start lol.

 

 
 
 

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