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Vlad Jovanovic
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Vlad Jovanovic's Discussions

Small System Client Build

Started this discussion. Last reply by Yaacov Levi Jan 29. 7 Replies

This is a system that we (Atria Aqua Gardens) recently built for a client in California.The system consists of 4- 50 gallon media beds…Continue

Tags: atriaaquagardens, vlad

Bad Batch of Plant !t Media (LECA)

Started this discussion. Last reply by Jeff S Nov 22, 2014. 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

 

Vlad Jovanovic's Page

Latest Activity


Moderator
Vlad Jovanovic replied to Hollis Armstrong's discussion Basic Questions
"Hi Hollis, thank you for the well thought out reply and some of your background info...and no, the tone it doesn't seem defensive at all... My concern wasn't that you were asking these types of questions, you should absolutely ask as…"
39 minutes ago

Moderator
Vlad Jovanovic replied to Hollis Armstrong's discussion Basic Questions
"While your at it...ask to see one of their systems that is producing...and ask to see their monthly production records. Or even easier than having to actually listen to and deal with Mr. Davis...just try doing a Google search for anyone who has had…"
10 hours ago

Moderator
Vlad Jovanovic replied to Brady Jensen's discussion WATER SOFTENER
"It is very unlikely that you will find any real data anywhere that will stand up to scrutiny or examination, as to the effectiveness of magnetic water treatment...nor will you find any scientific peer reviewed data explaining the mechanisms by which…"
22 hours ago

Moderator
Vlad Jovanovic replied to Brendan Van Epps's discussion Whitefly
"Whitefly infestations are certainly not exclusive to aquaponics. They are a pest which causes significant economic damage in many branches of the food growing industries. Plain water will work as just effectively as any seaweed extract will...as the…"
yesterday

Moderator
Vlad Jovanovic replied to Steven Gotting's discussion DOW blue board
"The biggest concerns using those boards are: 1) Fire retardants...which are really only a concern in scenariosof anoxic/anaerobic degradation (like at the bottom of a landfill...or any oxygen deprived environment), or exposing the board to any…"
Wednesday

Moderator
Vlad Jovanovic left a comment for Lori Royer
"Ok, thanks Lori :)"
Feb 20

Moderator
Vlad Jovanovic posted photos
Feb 20

Moderator
Vlad Jovanovic left a comment for Lori Royer
"Hi Lori, any chance you would want to sell a few catfish and blue gill fingerlings, (like 1 or 2 of each)? I'd like to add a couple to our in-store display…"
Feb 20

Moderator
Vlad Jovanovic replied to John Brock's discussion pH Test Issue
"Are you using the bottle labeled labeled "High Range"? If so, use the other pH reagent bottle and see what the test says then... "
Feb 18

Moderator
Vlad Jovanovic replied to John Brock's discussion AquaBuffer pH Stabilizing Kit Help
"Yes, your system is where it should be and you don't have to buffer anything (yet)..."
Feb 17

Moderator
Vlad Jovanovic commented on Chi Ma's group Aquaponics For Beginners
"Sinkers not sinkers* (stupid spellchecker)..."
Feb 12

Moderator
Vlad Jovanovic commented on Chi Ma's group Aquaponics For Beginners
"We need to define some things like name brands and batch numbers, in order for any of this to ha have meaning. Since in some cases 7-10% are floaters...while in others only 7-10% are sinlets..."
Feb 12

Moderator
Vlad Jovanovic commented on Chi Ma's group Aquaponics For Beginners
"Yeah, I have some like that too...while some of the others float the plants right out of the GB...even if only flooding 2-3 inches below the surface..."
Feb 12

Moderator
Vlad Jovanovic commented on Chi Ma's group Aquaponics For Beginners
"The floating LECA certainly is problematic. I've tried3 different brands, and they float...never becoming water logged and sinking. 5 different types of expanded shale, from 5 mines...and none were acceptable. All of them jacked EC/TDS way up,…"
Feb 12

Moderator
Vlad Jovanovic replied to Gabriela Lagrange's discussion ratio between number of fish and food ratio in a start up aquaponics.
"Yes, Gabriela these types of systems are relatively new and as I stated earlier, hardcore data is lacking (unlike the 25+ years of compiled UVI data). What could happen "mixing both wonderful resources in the long term"...is if you become…"
Feb 7

Moderator
Vlad Jovanovic left a comment for Mike Beckman
"Hi Mike...Get it up to and keep it just below pH7"
Feb 4

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.

Vlad Jovanovic's Photos

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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

Comment Wall (31 comments)

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At 8:42pm on November 28, 2014, Ivy said…

Hi Vlad, thank you for text me. Let me know which microbiological fertilizers  you are registering now 

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.

 
 
 

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