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PostPosted: Jul 2nd, '13, 08:59 
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I've setup a small grow bed and tank in my house, about 10 gal grow bed and 15 gal fish tank. I've gone through the entire cycling process with a 10% ammonia solution. I have 0 ammonia, 0 nitrites, and like 100 nitrates. There are some plants in the system now, and they are doing very well so far.

My question is, what do the fish provide besides the ammonia? Can I just continue to dose the tank with ammonia, and not have fish? Or do the fish provide more nutrients that I'm not aware of.

Also, I've been adding about 2 caps of Maxicrop Liquid Seaweed every week or so.

Thank you in advance for the help.


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PostPosted: Jul 2nd, '13, 09:15 
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Yes you can but would need to put other nutrients in the mix, so it would just become hydroponics. Fishless cycling is used by many people in new systems before the fish go in. I have too

The fish and fish food supply all the nutrients needed for plant growth

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PostPosted: Jul 2nd, '13, 09:26 
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Peeponics works well :)

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PostPosted: Jul 2nd, '13, 09:28 
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mantis wrote:
Yes you can but would need to put other nutrients in the mix, so it would just become hydroponics. Fishless cycling is used by many people in new systems before the fish go in. I have too

The fish and fish food supply all the nutrients needed for plant growth



I pretty much figured that it's hydroponics without the fish. So it's the fish that would provide phosphorus and potash, etc? Or is it the fish food that provides the nutrients?


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PostPosted: Jul 2nd, '13, 09:29 
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Gunagulla wrote:
Peeponics works well :)



I've looked into that as well. But I can't find much information. After the system is cycled how often do you dose it with ammonia?


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PostPosted: Jul 2nd, '13, 09:35 
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One dose per day can support quite a lot of plant growth.

Have a read through TCLynx's thread on the subject.

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PostPosted: Jul 2nd, '13, 21:21 
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I also have questions about what supplements and when to add. Anyone got some links on the matter. If it comes from the food then specific food is needed.


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PostPosted: Jul 2nd, '13, 23:02 
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aquaponics without fish is hydroponics and there's lots of companies that make balanced nutrient solutions to add to water for optimal plant growth.

check out your friendly neighborhood hydro store.

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PostPosted: Jul 2nd, '13, 23:08 
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bcotton wrote:
aquaponics without fish is hydroponics and there's lots of companies that make balanced nutrient solutions to add to water for optimal plant growth.

check out your friendly neighborhood hydro store.

brian



The question I still want to know, are the Nitrates sufficient nutrients for the plants or would I need to add additional nutrients? My Nitrates are very from just adding Ammonia. I've also added some liquid seaweed.

The Nitrates convert to nitrogen, but what else does it provide to the plant?


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PostPosted: Jul 2nd, '13, 23:32 
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The nitrates offer nothing else to the plants. If you want to continue, either add fish, or add hydroponic chemicals. I would say add fish, as the whole reason I started was I did not like the idea of adding hydro fertilizers.

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PostPosted: Jul 2nd, '13, 23:36 
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Ronmaggi wrote:
The nitrates offer nothing else to the plants. If you want to continue, either add fish, or add hydroponic chemicals. I would say add fish, as the whole reason I started was I did not like the idea of adding hydro fertilizers.



Does the fish poo add anything beside ammonia? It it mostly the fish food that adds the other nutrients?


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PostPosted: Jul 2nd, '13, 23:44 
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Most animals only use a percentage of the food they eat, therefore the waste is going to be beneficial to the plants after it is mineralized. Bacteria and worms do the work for us. Uneaten fish food does also add to the nutrient content, but we try to avoid uneaten food, as it can cause other troubles.

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PostPosted: Jul 3rd, '13, 02:56 
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Ronmaggi wrote:
Most animals only use a percentage of the food they eat, therefore the waste is going to be beneficial to the plants after it is mineralized. Bacteria and worms do the work for us. Uneaten fish food does also add to the nutrient content, but we try to avoid uneaten food, as it can cause other troubles.



That totally makes sense. I'm going to buy fish as soon as I lower my nitrates. Right now it's like 80+ Should it get it down to about 10 - 20?


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PostPosted: Jul 3rd, '13, 05:46 
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How big are your plants?
I added fish when my nitrates were high. The Nitrates are still high and I'm harvesting plants.

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PostPosted: Jul 3rd, '13, 06:22 
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jayendra wrote:
How big are your plants?
I added fish when my nitrates were high. The Nitrates are still high and I'm harvesting plants.


I have 6 plants. They've been growing for about a month now. They are looking really good (about 6-8 inches tall), that's why I was wondering if the fish are necessary. I'm sure they wont flower as well without the fish or added nutrients.

I've read that the nitrates should be too high. I know it's not as toxic as ammonia or nitrites, but I dont want too kill them.


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