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Vlad Jovanovic's Discussions

Bad Batch of Plant !t Media (LECA)

Started this discussion. Last reply by Vlad Jovanovic Oct 15. 13 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


Moderator
Vlad Jovanovic replied to Jack Dunbar's discussion Magnesium Deficiency? in the group Aquaponics For Beginners
"Finally, something decent to watch on YouTube...Thanks Jeff S. "
yesterday

Moderator
Vlad Jovanovic replied to Sonja Martin Young's discussion Alaska Aquaponics could use some help
"Hi Sonja, sorry to hear about your troubles. @Cindi, in your scenario i.e fish not being able to handle the nutrient load, zeolite to sequester ammonia, and water changes was pretty good advice. Unfortunately, Sonja is having 'the…"
yesterday

Moderator
Vlad Jovanovic replied to Jack Dunbar's discussion Magnesium Deficiency? in the group Aquaponics For Beginners
"Sure thing Jack. Happy to help. There is a search field (white rectangle) in the extreme upper right hand corner of your screen. It's to the right of your name and to the left of the little magnifying glass icon. It's a great tool, as…"
yesterday

Moderator
Vlad Jovanovic replied to Suzanne Hayes's discussion Pulling plants
"Sure Scott, just let me know how much you want. I have some Actinovate (Streptomyces lydicus WYEC 108) as well. Same deal with pricing...meaning we'll just divide what I paid for it (I don't wish to make any sort of profit). Actinovate is…"
yesterday

Moderator
Vlad Jovanovic replied to Suzanne Hayes's discussion Pulling plants
"Right-o Alex. Beneficial insects are an integral part of a good IPM (Integrated Pest Management) program. Most people only start thinking about such things after they have somewhat gotten out of control...in which case your beneficials may have a…"
yesterday

Moderator
Vlad Jovanovic replied to Rob Nash's discussion DIY Heater, build your own 2000 watt heater for $20 ***DONT USE COPPER OR NICKEL ELEMENTS!
yesterday

Moderator
Vlad Jovanovic replied to Jack Dunbar's discussion Magnesium Deficiency? in the group Aquaponics For Beginners
"If you have a sump tank that woils be fine. I'vs added directly to the fish tank in systems that don't have a sump, with no problems. Dissolve the Epsom in a bbucket with some top up water, and then add that water."
Thursday

Moderator
Vlad Jovanovic replied to Jack Dunbar's discussion Magnesium Deficiency? in the group Aquaponics For Beginners
"57.5 grams of Epsom salt into 100 US Gallons of water will garner you 15ppm of Magnesium. 15ppm is about half (30ppm) of the total Mg you would want in solution. So it's a pretty low dose and assumes there is some amount of Mg already present…"
Wednesday

Moderator
Vlad Jovanovic replied to Rob Nash's discussion DIY Heater, build your own 2000 watt heater for $20 ***DONT USE COPPER OR NICKEL ELEMENTS!
Wednesday

Moderator
Vlad Jovanovic commented on Jeremiah Robinson's group Cold Weather Aquaponics
"Hi Jeremiah, I'm not saying that Jeff's sump will float, but neither am I saying that it will not. Only that if certain conditions conspire to align, it can. I've seen a buried IBC sump do that. Two of them actually. The one sump had…"
Wednesday

Moderator
Vlad Jovanovic commented on Jeremiah Robinson's group Cold Weather Aquaponics
"Hi guys, remember Archimedes of Syracuse ...that guy who told us that when our 50 gallon grow bed is filled with media (rocks, LECA, whatever) that it will no longer hold 50 gallons of water? That same Principle of his, so aptly laid out over 2,200…"
Wednesday

Moderator
Vlad Jovanovic joined Jeremiah Robinson's group
Thumbnail

Cold Weather Aquaponics

This group serves the needs of those who grow in the cold parts of the world.  We'll discuss greenhouses, insulation, air sealing, fish selection, heaters, etc...See More
Wednesday

Moderator
Vlad Jovanovic replied to Suzanne Hayes's discussion Pulling plants
"I bought a 1 quart bottle of Mycotrol - 0 (it's the certified Organic version of the product/ingredient you posted Randal). It's the same active ingredient, that being Beauveria bassiana. Strain GHA. I paid $109.00 plus tax and shipping…"
Wednesday

Moderator
Vlad Jovanovic replied to Suzanne Hayes's discussion Pulling plants
"Yes, pulling all your plants art one will disturb your bio-filter a bit. It is not uncommon (if someone is paying attention that is) to experience a "mini" nitrite spike. Nothing too drastic IME... and those "mini" spikes only…"
Tuesday

Moderator
Vlad Jovanovic replied to Mike Beckman's discussion Beginner water questions in the group Aquaponics For Beginners
"Mike - so it seems that you have your head wrapped around why you wouldn't want to add fish at a time when ammonia is 6ppm, nitrites are starting make a showing, and pH is unknown. Keep that line of thinking. Rain water is pretty soft and…"
Tuesday

Moderator
Vlad Jovanovic replied to Mike Beckman's discussion Beginner water questions in the group Aquaponics For Beginners
"The API test kit only goes to pH 6. So anything below that (4.6, 5 etc...) shows up as pH 6.0...so you really don't know currently where you pH level is actually at. Check the pH of your source water (tap water, well water...whatever) And let…"
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.

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

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 (29 comments)

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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.

 

At 4:01pm on August 21, 2012,
Moderator
Jon Parr
said…

Ha. CMH for camera. Deal.  I posted the pic here:

http://community.theaquaponicsource.com/group/californiaaquaponics/forum/topics/santa-cruz-area-ap-tour-august-18th-and-25th

Can you join us this weekend?

Yes, that was my first steelhead, on my first attempt at fly fishing on the Klamath river last year. Hope to return this year. I'm a fairly regular ocean fisherman, and I love to freedive and shoot big fricken fish, but lakes and streams are new territory. BTW, I'm going out for albacore next week, hope to spear a few. My buddy went out on Saturday and saw a school of 50 plus albacore just lounging under the boat.  Woohoo, can't wait.

 
 
 

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