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 Post subject: Plant Health
PostPosted: Jun 3rd, '18, 00:04 
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I have had my system for a year now and I have never had good plant health. I am lost on what to do. Previously I had problems with spider mites and thought they were causing all the issues. But now I do not see any mites and all the plants have been replaced. Right now I have 20 green beans plants growing but they do not look healthy. Can anyone help me figure out why my plants are doing bad? I was also wondering should I send in a water sample for testing to see if I have a deficiency?


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 Post subject: Re: Plant Health
PostPosted: Jun 3rd, '18, 04:34 
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There's no need to go to the expense of a water test, Google will give you lots of information on your deficiencies.

Not having any success with your plants for so long, what feed are you feeding your fish?, your plants get their nutrients from the fish feed, poor quality feed wont help and is the pH in your system locking out any of the nutrients?

http://customers.hbci.com/~wenonah/min-def/beans.htm






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 Post subject: Re: Plant Health
PostPosted: Jun 3rd, '18, 06:43 
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Great info joblow.

Have you tried lettuce or a chard. Those do well in almost any water.

My guess is not enough light.

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 Post subject: Re: Plant Health
PostPosted: Jun 3rd, '18, 12:20 
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DanaPT wrote:
Great info joblow.

Have you tried lettuce or a chard. Those do well in almost any water.

My guess is not enough light.



Manny I grow a lot of Lettuce and Chard and have absolutelty no problems with either, and I've grown some very big Chard.

You could try increasing your light level and see how that goes.


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 Post subject: Re: Plant Health
PostPosted: Jun 3rd, '18, 22:11 
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I’m trying to keep the pH at 7. However the pH will very because it does like to raise and I will add some downer to lower it. I have goldfish and tropical fish in my system. I have been using Spirulina 20 fish flakes to feed them. I will take recommendations on fish food. My system is about 4 foot by 2 foot long and I have two grow lights. Here are the light I bought: https://www.amazon.com/gp/product/B01F5 ... UTF8&psc=1

I have noticed the plants do like to grow towards the window they are by.


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 Post subject: Re: Plant Health
PostPosted: Jun 3rd, '18, 22:25 
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If it is a light issue, what lights would you recommend buying?


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 Post subject: Re: Plant Health
PostPosted: Jun 3rd, '18, 23:27 
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Hi Blackfire, sorry to see you're having plant problems. The leaf shots are good but if you can a few shots of the whole plant in natural lighting that will help with the nutrient deficiencies. Looks like you might have several things going on.

Since your fish food is where your system gets it's nutrients. What kind of food are you using and how many fish are in the system?


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 Post subject: Re: Plant Health
PostPosted: Jun 4th, '18, 22:53 
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I have been using Spirulina 20 fish flakes to feed them. It's hard to count the number of fish but some where around 22-26.


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 Post subject: Re: Plant Health
PostPosted: Jun 5th, '18, 00:59 
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I started out thinking you needed to take care of the nutrient issues first but I do think there is a lack of light based on the thickness of the stem and the distance between nodes on the plants so probably should tackle both feed and light.

Looks like Joblow already has covered fish feed as an issue and I just missed it when I skimmed the post. Most of the flake foods don't have the nutrient levels needed for fish and plant growth, they're more of a maintenance feed. I think you're seeing a bunch of different nutrient deficiencies because of this. You can either go with a good commercial fish pellet (something like Skrettings or Purina Aquamax) or you can supplement with something like Blood and Bone, which will supply the missing nutrients along with slow release nitrogen. Other things might work but you have to be careful, the wrong form of nitrogen or too much could cause an ammonia spike and kill your fish.

What kind of fish are these?


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 Post subject: Re: Plant Health
PostPosted: Jun 5th, '18, 03:28 
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I have goldfish and tropical fish in my system.


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 Post subject: Re: Plant Health
PostPosted: Jun 5th, '18, 04:42 
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Does anyone recommend this for goldfish?

https://www.theaquaponicsource.com/shop ... ht=5+Pound


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 Post subject: Re: Plant Health
PostPosted: Jun 5th, '18, 05:37 
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I haven't used it but I would expect that to work. The protein content is very high and usually with a high protein content you get a higher price. Trout feed (which I consider to be high protein content) is usually around 40% and this is showing as 50%. FWIW, Younger fish generally need higher protein content than older ones. Anything the fish don't digest is still going to break down and contribute to the nutrients and nitrogen that winds up going to your plants so that higher protein content not necessarily a bad thing. If it were me I'd probably look for a feed that was designed for growth and is in the 36 to 40% protein range. if you're not having to use much then saving a buck a pound probably isn't going to matter.

This is a pretty good write up on what to look for on the label in a fish food - http://www.koivet.com/a_assessing_feed_labels.html. It's not geared toward Aquaponics but the main thing with AP is that you want a bit higher protein and the feed should be designed to grow the fish not maintain it as is.


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