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

Vlad Jovanovic commented on Jeremiah Robinson's group Cold Weather Aquaponics
"Hey Jeff, sorry to hear your sump ended up floating...Again, we need to stay within the parameters set forth 2,200 years ago by Archemedes of Alexandria from my earlier post..."Any object, wholly or partially immersed in a fluid, is buoyed up…"
20 hours ago

Vlad Jovanovic replied to Rob Nash's discussion DIY Heater, build your own 2000 watt heater for $20 ***DONT USE COPPER OR NICKEL ELEMENTS!
"Yeah, fill thee back (while it's dry of course) with silicone, polyurethane sealant/adhesive...or some other appropriate insulative material. You wouldn't want the condensation to potentially short anything out. "
Oct 22

Vlad Jovanovic commented on Jim Fisk's group IBC Aquaponics
"Yeah, in a homestead type "cut and come again" setting, I suppose one of the only potential advantages that a DWC trough might provide would be the extra water volume (thermal stability, a bit more pH stability)..."
Sep 30

Vlad Jovanovic replied to Charlotte Seibert's discussion Aphids, ladybugs and worm tea
"Yeah, A. colemani rock, and work really well with other biological agents i.e different aphid eating larva. Using these combinations of multiple predators has shown to be particularly important if you already have an infestation on hand even if…"
Sep 25

Vlad Jovanovic commented on Delbert Johnson's blog post Aquaponics without fish
"Yes, it is very possible. Though not from just the algae as George alluded to. But with all that organic build up (and worms) to provide plant essential elements...yes quite possible (and already been done :) People get hung up on the fish for…"
Sep 18

Vlad Jovanovic replied to Charles Sublette's discussion Best tool to cut slits in PVC?
"Table saw gets my vote..."
Sep 14
Dan Peterson joined Vlad Jovanovic's group

Fish-less Systems

This is a group for people who have any kinds of fish-less systems, but yet are not doing classical hydroponics. Where we can share what we have come to find about making-home made nutrients, oganic-hydro, pee-ponics, worm tea hydro, bio-ponics, home-made buffers, water chemistry or anything else that is perhaps inappropriate for fish. As well as experimenting and sharing results for  things that might be alright for our aquatic critters.See More
Sep 7

Vlad Jovanovic replied to Michael Brooks's discussion Nutrient Supplementation in Certified Organic Commercial Aquaponics
"Hi Michael, In order for you, or anyone else to answer your questions regarding quantities/weights of particular amendments...we'd need to know some things... 1) Total system water volume. (This value is known, since you stated 140K US…"
Aug 17

Vlad Jovanovic replied to Shane's discussion What would you define as Essential Reading
"About 20 years or so...but only became interested enough in aquaponics to build out a 2,100 sq.ft system about 4-5 years ago. Yeah, there can be a lot to take in at times, but well worth it...since it seems like the success or failure of growing in…"
Aug 15

Vlad Jovanovic replied to Ted Bechtold's discussion Tomato's are green on top
"Hi Jeff, There are a number of reasons a tomato will start wilting. Since we can rule out under watering as the cause, the next most common causes are Fusaruim wilt (fungal), Verticillium wilt, (fungal) bot are quite common, spotted wilt virus (a…"
Aug 15

Vlad Jovanovic replied to Shane's discussion What would you define as Essential Reading
"Hiya George, Yes, even beyond mitigating nitrite toxicity issues (though that is the biggie) there can be benefits for the fish. The way I've been doing it (for about 3 years now), the salting benefits the plants as well.  Salts are simple…"
Aug 15

Vlad Jovanovic replied to Ted Bechtold's discussion Tomato's are green on top
"Looks like you have the 'ol "yellow shoulder" (that's really what they call it)...It's really not just the skin that is yellow. The tissue well beneath the skin is now abnormal and damaged.  Causes are an interplay of…"
Aug 13

Vlad Jovanovic replied to Shane's discussion What would you define as Essential Reading
"I feel that these might be worth a read...and pretty easy to understand...the second one may be of interest to you, as it deals with salts for fish…"
Aug 12

Vlad Jovanovic replied to Shane's discussion What would you define as Essential Reading
"I don't know that you'll be able to find one single "go-to-lifeline" type document...there are three entirely different disciplines rolled into one (fish husbandry, hydroponics and waste water management). There are scores of…"
Aug 11

Vlad Jovanovic replied to Don Cole's discussion Is there a comprehensive chart that lists the "normal" range for the different water tests.
"1). Yes, there are "ideal" ppm's for every element, for every particular plant in every particular phase of growth. The ideal ppm's for lettuce are quite different than ideal ppm's for cucumbers...which is why you will…"
Jul 11

Vlad Jovanovic replied to Don Cole's discussion Is there a comprehensive chart that lists the "normal" range for the different water tests.
"Well, I'm certain my answer isn't going to be as linear as "the chart" that you were looking for, but... 1). You are not necessarily in "lockout range". 140 to almost 200 can be fine (especially for heavy fruiting…"
Jul 10

Profile Information

How did you find us?
Search engine (Google)
If you found us through a search engine, what search words were you using?
Are you an aquaponic gardener already?
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)
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…


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…


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…


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.


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

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…


bolje vas nasao!

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


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,
Alex Veidel

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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