Vlad Jovanovic
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Vlad Jovanovic's Discussions

Nitrospira and NOT Nitrobacter May be the Main Nitrite Oxidizer in AP Systems

Started this discussion. Last reply by Vlad Jovanovic May 9. 3 Replies

It seems that a bacteria long thought to exist only in marine environments, may in actuality be the main producer of nitrates from nitrites in waste-water treatment plants, fresh water aquariums…Continue

Tags: cylce, Nitrogen, Nitrobacter, Bacteria

The Dreaded Pythium

Started this discussion. Last reply by Vlad Jovanovic Feb 12. 15 Replies

This past week I noticed a few spider mites in my all hydroton/mineral salts hydro system. Caught 'em early, sprayed with the usual 3-5% oil 0.5% surfactant mix, next day twice with plain water, 2…Continue

Tags: pH, Pythium

Expanded Clay Media

Started this discussion. Last reply by Carey Ma Nov 6, 2011. 7 Replies

For anyone living in Europe, there is an Austrian company that makes an expanded clay media called "Liaflor" that is around one third of the price of Hydroton.I've researched the two products a bit…Continue

Bulkheads and fittings American vs. European compatibility

Started this discussion. Last reply by Vlad Jovanovic Oct 30, 2011. 5 Replies

For anyone living in Europe and ordering bulkhead fittings or PVC adapters from the USA, (like I had from Aquatic Eco Systems), be aware that the PVC pipe you buy in the EU is 1.608 millimeters…Continue

 

Vlad Jovanovic's Page

Latest Activity

Steve Perreault commented on Vlad Jovanovic's blog post Speeding Up Seed Germination
"Vlad -  You may be onto something. Good luck with your experiment - germination has fustrated me too. I may try a few experiments of my own. BTW - I did a search on this and came up with this interesting experiment that used hot water to…"
5 hours ago
Sylvia Bernstein liked Vlad Jovanovic's blog post Speeding Up Seed Germination
8 hours ago
Vlad Jovanovic posted a blog post

Speeding Up Seed Germination

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 make peppers…See More
8 hours ago
Vlad Jovanovic replied to Jeremy Wheaton's discussion Leggy, thin, and/or lenky plants
"S far as specific brands go...IDK i'm sure there's a bunch of good ones. Personally though, all of my ballasts and most all of my bulbs are Phillips brand. I'm really, really happy with, and have been getting good results with the…"
12 hours ago
Vlad Jovanovic replied to Allisyn Wood's discussion Organic nutrients??
"According to the NOP all those things have a status of "Allowed" in organic food production, except certain iron chelates... (Not all chelating agents are the same...EDTA, EDHHA, DTPA etc...and the rules here in Europe can be slightly…"
yesterday
Vlad Jovanovic replied to Phil Bowyer's discussion Do I have this about right?
"Yeah, huge beds (from what I've gathered) seem to come with their own set of specific  'problems', luckily there are usually solutions to apply. IMO 6 feet is plenty long. 4 or 5 - 6' long by 4' wide beds with a…"
yesterday
Vlad Jovanovic replied to Elaine Sanders's discussion What's wrong with this plant?
"Yeah, it's sold as an organic fungicide for dirt gardening, but you can use it in the same way you'd use hydrated lime to raise your pH...Allisyn, have you ever buffered your systems water pH up before? With anything (top up water counts…"
yesterday
Vlad Jovanovic replied to LaDell's discussion Asian Carp
"Carp is definitely considered native around here. Now, I tried some that tasted better than others. But I've eaten catfish that tasted downright 'muddy', then again I've had catfish on my plate that I wouldn't have…"
yesterday
Vlad Jovanovic replied to Phil Bowyer's discussion Do I have this about right?
"Yep, and then there's that. Which is exactly what I did... 8 IBC grow beds ranging from 14" to 18" deep, a repeat cycle timer and a low flow sequencing valve, filling 4 sets of 2 in sequence. If you're not dead set on one big…"
yesterday
Vlad Jovanovic replied to Elaine Sanders's discussion What's wrong with this plant?
"Hi Alison, MaxiCrop with Iron, if I recall correctly is a product that contains iron sulfate as the iron component, not any form of chelated iron...That being said, with a pH of 6 and a decent quality fish food it's weird that you should be…"
yesterday
Vlad Jovanovic replied to Phil Bowyer's discussion Do I have this about right?
"Plan on at least a 400 gallon sump. 4'x128'x1' = a volume of 837.82 gallons (depending on the size/density of your media blablabla-blabla figure 38% displacement. You wont be filling the bed to the brim with media anyways AND…"
yesterday
Melissa Rasmussen joined Vlad Jovanovic's group
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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
yesterday
Vlad Jovanovic replied to Nigel Clement's discussion Bad Weather in the group Commercial Aquaponics
"Wow, I used to envy all you guys living in those warm climes until I came across this thread ...sheesh... I have installed a system of slightly tensioned wire rope with turnbuckles connected to the load bearing members of the greenhouse to help…"
yesterday
Vlad Jovanovic replied to Phil Bowyer's discussion Do I have this about right?
"Yep, the 'general consensus' and 'rules of thumb' is that your 112 sq.feet of 12" grow beds should support a MAXIMUM fish load of 112lbs. Now, you probably wont need anywhere near that number of fish to grow your…"
yesterday
Vlad Jovanovic commented on David Schwinghamer's group Arizona Aquaponics
"I've got a couple of zucchini plants (Tigress variety) that look exactly like your last photo :(  I'm surprised it's not worse seeing as how we are still drowning in rain over here this year. I spray the leaves, and…"
Sunday
Vlad Jovanovic replied to Jon Parr's discussion Square Grouper in the group Threadjackers
"LOL! you should have tied the remaining 19 bags to different buoy's out in the cove and told all that you 'stashed' 'em for him "out there"...  That's a great story Jon..."
Sunday

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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?
No
If so, what type of system? (pick all that apply)
combination
What type of fish do you grow with? (select all that apply)
Other
How big is your fish tank?
4,850 litre
Please tell us something else about yourself.
Still in the build phase. 2131 sq.foot Greenhouse completed fall of 2011. Have 8 IBC media beds/pipework, for growing as well as pre-filtering the Friendly's style DWC. 4,850 litre fish tank, 2000+ litre sump buried in the ground small seedling raft built. Am working on the 546 sq. feet of DWC rafts. Will be using Carp as it is very tolerable to conditions here and is also the single most bought/sold/eaten fish in these parts. Though I do not plan on selling them for profit.

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Vlad Jovanovic's Blog

Speeding Up Seed Germination

Posted on May 27, 2012 at 5:01am 1 Comment

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

Greenhouse Heating using Lights Update

Posted on January 10, 2012 at 9:00am 0 Comments

Ok, so basically what I’ve found is that using the set-up described in the previous blog, is that I was able to obtain a 9-12 degC difference in air temps, in a 2.4 m3 space using just the heat off of the T-8’s, which were left running 24/7. This increased to 20+ degC when the 250MH kicked in (from 12 midnight till 7:30am). I was able to sprout over 100 plants split between 3 different cultivars. COS Romaine, Spinach, and a local variety of red/green lettuce. After sprouting, which took…

Continue

Determining Homemade KOH (LYE) Concentrations

Posted on January 9, 2012 at 3:30pm 8 Comments

Ok, so everyone has to buffer their pH back up with something, right? Slaked/hydrated lime (CaOH), Potassium Hydroxide (KOH) (usually reserved for the big leagues, UVI, Neslon Pade type systems, and rightly so. KOH can be dangerous to work with as it is highly caustic and a very powerful buffer). With most folks by now settling on alternating between CaOH and KHCO3 (known to most folks as Potassium Bi-Carbonate, here, in this country, it is referred to as Potassium Acid Carbonate as…

Continue

Net Pot Filling HG HID Heating/Sprouts

Posted on December 14, 2011 at 7:12am 2 Comments

Here is an idea that I originally saw in on one Chris Smiths posts (Chris seems to be full of practical and useful ideas, thanks Chris)...Originally I wasn't going to sprout my seeds in a hydroton only media, but after trying  this, this past summer with 50 or 60 different plants (from various leafy green types, to tomatoes and peppers), I saw that it works great. Every seed I planted sprouted as good or even better than in all the different cocco coir, vermiculite, perlite, worm casting,…

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Comment Wall (13 comments)

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At 12:34am on May 25, 2012, Gina Cavaliero said…

Thanks for the friend request Vlad!  I didn't realize we weren't already friends.  :)

At 10:49am on March 10, 2012, Eric Warwick said…

 http://www.youtube.com/watch?v=eWM2joNb9NE In response to your search for a profile picture for business: "So I thought rainbows and unicorns are also good in the business world".

At 4:38pm on January 26, 2012, Jon Parr said…
Thanks Vlad, big 39. Hoping nobody would notice:-) 
At 7:09am on January 21, 2012, Carey Ma said…

Yes Vlad, that appears to be alfalfa. How much can you get/ send me? I am interested in the clover seeds you mentioned as well. I think we can try one pound of each first to test Chinese Customs before we try sending larger volumes.

At 9:41pm on January 20, 2012, Carey Ma said…

Anything, any type of open pollinated seeds would be welcome. Clovers fit the bill nicely. Any luck with Alfalfa?

At 10:16pm on January 13, 2012, Carey Ma said…

PS

That is a kewl looking system and looks like it is easier to resolve after each grow cycle than the old colossuem which took a lot of hydrogen peroxide to clean out the dead roots. The price of this contraption is simply way too expensive for any but those that grow pharmaceutics.

At 10:09pm on January 13, 2012, Carey Ma said…

Thank you my friend, I need both dormant and non dormant Alfalfa most desperately followed by Ladino Clover and Birdsfoot Broadleaf Trefoil. Timothy Grass, Milk Vetch, Lucerne and other high protein, open pollinated grasses would also be most welcome. (I need a total of around one hundred pounds of grass seeds but think it may be unreasonable to ship such quantities without hassle from customs). I have had seeds shipped here in five gallon buckets with no problem but anything bigger may be considered commercial and may need testing/ certification etc. Please send only as much as you are comfortable with. 

In fact I would be glad to receive any and all open pollinated seeds. I have plenty of Basil varieties but non in bulk so a pound of Basil seeds would be wonderful. Fruit, berries and wild flowers would also make excellent additions. One can never have too many seed varieties/ cultivars.

Of course I would gladly pay for the seeds and shipping but donations in any form would be much appreciated. I appreciate any help but don't want to put anyone out of their comfort zone.

Cheers

At 1:42pm on January 13, 2012, Bill Moore said…

NTF working great so far.  Only concern has been the mold growing on the peat cups.  Won't do that again.  Will just resort to Hydroton.  Transplanted some plant remove peat.  This is an experimental system for me to learn on, and having a great time at it.

At 9:01pm on January 8, 2012, Carey Ma said…

Hey man, Thanks for your quick reply. It saddens me greatly to learn that even former eastern block countries are being/ have been contaminated and converted to hybrids. I hope there is enough of us around the world to preserve the old way of farming.

At present I have around one hundred and fifty different vegetable cultivar in my seedbank so don't need any per se, but am always interested in expanding my options, especially cold tolerant varieties. In the next few years, I am hoping that I can grow-out most cultivars as seed stock with my new farm. My present garden just isn't big enough to grow more than a one or two of each for food and replenish seed stock for the following year.

Another reason I want so much variety is to conduct an experiment to develop my own strains that would be unique to the local climate, (which may take up to twenty years to develop).

I thank you in advance for your time and consideration.

Cheers my friend

At 7:46pm on January 6, 2012, Carey Ma said…

Hello Vlad, I was wondering if you can get access to any heirloom (AKA open pollinated) seeds in your area or is everything commercial hybrids? I would like to expand my seedbank and require your help if there are any heirloom seed around.

 
 
 

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