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 Post subject: Cookie's system
PostPosted: Feb 16th, '14, 04:19 
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Sup folks. This thread is going to be all about DWC system and everything i have learnt from the past 4 years of pursuing the Miracle Growing techniques, AQUAPONICS. This will also be a thread which encourages discussion about anything pertaining to Aquaponics and cooking.. because i soo love food :cheers: .
You can hijack if you want but keep it in line of what? thats right Aquaponics. All information will be share on request because i believe someone should not have to pay for the information to feed themselves, simply as that.
Finally i want to thank Charlie for being as open as he was and responding to my question, and also Colours for indirectly pushing me to find a solution to her problem even though she doesn't know i was looking shhh :shifty: don't tell here. Ok that it onto the main features. enjoy :headbang:

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 04:28 
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i got two separate systems, one is i believe 800l in total. second is about 1500l in total. both is 1:1 ratio ft to gb. 800l got i think 15 fishes with 2 pounds on average weight each. they eat bout 360g of feed a day. now to plants.strictly DWC and mostly tomatoes. i like to push the limits :lol: .
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this was initial pic at day of planting. they were planted from seedling and well this is it today.
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also some previous shots of tomatoes that grew in the peroid.
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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 04:31 
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more pics.
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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 04:33 
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Previous harvest :) .
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i lost last pic somewhere... o well... stay tune for more. got to go to work.

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 05:18 
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now to second system, a next DWC, but i'm tryin to focus on growing sweet peppers and tomatoes primarily and some seasoning here and there . here goes;

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 05:20 
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some more photos;

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 05:22 
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degas chamber... i couldnt resist using the space to plant additional stuff :)

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 05:26 
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my bio filtration.

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opps forgot to rotate. :whistle:

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 06:24 
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Seriously, this cant be healthy.
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cookie wrote:
15 fishes with 2 pounds on average weight each. they eat bout 360g of feed a day.


360g of feed/day :shock:

Is that wet feed?

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 07:09 
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nope dry weight... I got like 150 1 to 2 pounds fish in 1500l.. the eat close to 900g per day.. first of all I didn't mean initially no nothing of stocking density when I create my system.. it was just all about aquaculture... u should see what I started aquaponics with..

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 07:33 
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Great to see you start your system thread, cookie. Your system and plants look amazing. I look forward to updates ;)

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 08:07 
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thanks Charlie. I follow your system closely everytime I get spare time. Hopefully I can get to your standard someday... o well in the mean time I'll try to display everything indepth as I can... too water analysis I go..

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 08:31 
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ammonia 0ppm
nitrite 0.25 ppm
nitrates 30-40 ppm.
ph 6.8 -7
water temperature 28 degC.

may both system runs identical although the bigger one has close to 7 times the fishes as the smaller one, I still never get ammonia problems. the big difference is that the 1500l (the bigger or the two) his a bit higher conductivity at 580 micro siemens compared to the 800l at 440 micro siemens.
I will like to add that I don't buffer my systems nor do I put shell grits into my system. I don't need to add potassium anymore because my system pH stablized itself for itself. All I do I feed fish and take measurements.

secondly I am currently retaining all the fish waste, within the system's bio filter because of the added benefit of :
1 allows further mineralization of the fish waste to obtain phosphate and other stuff.

2 To actively remove excess nitrates from system and prevent over- accumulation of nitrates over time by allowing seclective anaerobic areas ONLY within the filter medium. Why do I remove nitrates? Because I believe a balanced nutrition is better than too much of one thing.

3 This point I'm about to share may be unknown to most people's eyes. but I'm a generous guy so here goes. the Correct accumulation and I stress CORRECT accumulation of soild in a filter actually and drastically increases the total biological surface of your system.. and you can imagine why. what else is easier from bacteria to grow on than fish faeces.. I'm sure by now I made you reconsider the norm of traditional aquaponics growing practice. stay tune for more where I explain why suspended solids should always be encouraged to be removed before it goes in a DWC gb system or even a media one as well.

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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 08:47 
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Sometimes I pulled from a previous posting: enjoy

ok im going to try to clear the air with my understanding of aerobic/anaerobic/anoxic. note there is a big difference between anaerobic and anoxic. firstly aerobic digestion is the process which efficiently converts ammonia to nitrites them to nitrates. seeing that this process actually oxidize the ammonia in both cases we can see why it is favors oxygen rich environment. simultaneously the process also utilize carbon dioxide for cellular growth and so on and hence producing H+ ions as a byproduct. The big disadvantage of this process is the rapid decrease in pH over time which can cause your system ecology to crash simply because this process indirectly utilize Carbonate in the form of CaCO3 by combining with the free H+ ion and hence releases more CO2 gas for the bacteria to feed on. This is why water hardness decreases over time. from this process we see that aerobic bacteria mainly uses dissolved substance ammonia/ carbon dioxide as energy sources therefore most of the carbon locked away in the fish waste isn't broken down at a significant rate simply because there are surplus 'food' for the bacteria already in the water. Therefore all the minerals thats locked away in it organic form is the fish waste isn't fully utilize because the bacteria needs to exert more energy to get the same growth. and here is where we go to anaerobic decomposition.

Anaerobic digestion, dissolved O2 <1mg/l on average. People usually shy away from this type and wants nothing to do with it especially when it pertaining to aquaculture/ aquaponics. Some say that ‘ anaerobic pockets’ within a system can cause spikes in ammonia and even decrease the ability to create nitrates. They are partially correct, but I’m not going too in-depth into the biology. Anaerobic bacteria unlike aerobic bacteria favors oxygen-less atmosphere, mind you is they are exposed to air they do not die but simply mimics aerobic bacteria. The disadvantages is that they are very inefficient when compared to aerobic;  it’s like ( don’t quote me) 1million anerobic bacteria is needed to do the same work as 1 aerobic bacteria. We may wonder then why should we even need it, best we keep it out our system to begin with. But the advantage of anaerobic bacteria is limitless to put it simply. First of all they utilize organic carbon, you know the ones thats bounded to proteins and other matter in the fish waste, so by using this type of carbon the bacteria is forces to reduce the protein links and hence releasing the stored minerals. But we see this as a rise in Ammonia simply because this was the locked away unutilized orgainic nitrogen within the fish waste and thats why we see a spike in ammonia because if we keep our feeding rate steady the bacteria in the system has already formed to use all the ammonia produced from the fish at feeding. But now we have another ammonia input from the decomposing fish matter in the anaerobic areas. So well this leaves your system to undergo a micro cycling once more because of this, but is extremely worth it cause of all the minerals released into the water, especially phosphorous, potassium. For more information research waste water treatment.

Secondly, the next big advantage of Anaerobic process is the conversion of excess nitrates to nitrogen gas. We should be encouraged to do so mainly for the reason of pH control. People normally says that anaerobic regions increases your overall pH, and sometimes goes as far to say that the pH will continuously increase till bout lest say pH8. They are wrong in a way. The byproducts  of anaerobic digestion are actually organic acids suce as acetic acid and latic acids alcohols and so on. But the in the process of denitrification nitrates are reduced to nitrites then to nitrous oxide then to nitrogen gas.

NOTE: NITRITE is never converted backed to AMMONIA and can never be I believe.

In this process all the carbonates that was utilized to produce nitrates is recovered and basically a well designed system can balance the conversion to all maintain pH at 7 without adding buffing agents. By reducing nitrates; this favour fruiting plants such as tomatoes and so on. But i must warn you, now we got to process within the system producing Nitrites so your Nitrite level will peak and hence i said well designed system. Now to anoxic. Anoxic digestion is where everything goes downhill.

Anoxic digestion dissolved oxygen = 0ppm, dissolved nitrates = 0ppm. Reason i put in nitrates also is because not living organism cannot survive without “O” aerobic bacteria gets their “O” from air as O2 or oxygen. Anerobic bacteria gets their “O” from mainly Nitrates/Nitrites (NO3/NO2). But when nitrates and oxygen hits 0ppm this is when the stink smell begin. Basically the bacteria is forced to utilize the “O” from sulphates(SO4) and from ferrous oxide(FE2 O3). The byproducts is the nasty smell of hydrogen sulphide or H2S. And thats why when after a certain thickness of solids collect at the base of a RFF it starts to stink because O2 nor NO3 is not able to diffuse into the layer fast enough to feed the bacteria. So they use the next best thing. But if u can design your filter well u can be able to utilize the benefits of both aerobic/ anaerobic digestion together with mechanical filtration all in one filter. Rate comment share.




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 Post subject: Re: Cookie's system
PostPosted: Feb 16th, '14, 09:58 
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Do you start the seeds in the gravel net pots, or transfer them?

It looks like a good idea, the extra weight might keep them flopping around too much.

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