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PostPosted: Mar 27th, '19, 23:16 
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Hi Folks,

We fired up our system October 2018, it is located in a green house that gets no colder than 55 F. The plants tomatoes, peas, green beans, radishes that we planted at that time really took off. Lettuce in two DWR did well also. We are currently have the 2 DWR and 6 grow beds in production. Then our 2 tomato plants started looking odd. On doing some research on this site I think that we do not have enough fish in our system to provide the right food mix for the tomato plants.

We have a 1,400 gallon fish tank and a sump under the grow beds that holds around 300 gallons. We have 55 hybrid blue gill that are about 4-5" long. I wanted to start slow and was planning on adding 50 crappie to the mix this spring.

Iron 2.52 PH 6.7 AM., Nitrates and Nitrites are fine.

1.) Am I correct that I need more fish?

Attachment:
tomato.jpg
tomato.jpg [ 65.07 KiB | Viewed 991 times ]


Attachment:
tomato2.jpg
tomato2.jpg [ 65.62 KiB | Viewed 991 times ]


The plants went in October, were about 9 " tall, the stem is twice as thick where it grew out from the Aquaculture System as it was in dirt. The plants were fine until about 3 weeks ago.


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PostPosted: Mar 28th, '19, 12:15 
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It looks like a combination of deficiencies

Most likely potassium and magnesium

What are your Nitrates , more is not necessarily better , plants like nitrates and will take them up in preference to other nutrients, triggering deficiencies .

Greens like lettuce don't need much more than nitrogen

Fruiting plants need much more first to flower and set a crop and grow to harvest

In a ideal world ammonia and nitrates would be zero

This means your system is perfectly balanced

As plants are changed / grow bigger their demand on the system changes

Bring your Ph up a bit

Nitrates around 20 / 30 ppm (in the orange on the API colour chart) so you have enough with a bit of reserve

Add some Potassium

Add some magnesium

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PostPosted: Mar 28th, '19, 23:01 
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Tested the system PH 6.8 Ammonium .25 Nitrite 0 Nitrate 2 To get the nitrates up logic would seem to say either remove some plants or add more fish is that correct?

The crazy thing is that plant has 4 tomatoes that are growing and has recently set 4 more.

Thanks for you help on this!


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PostPosted: Mar 28th, '19, 23:57 
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What's sure is that your problem isn't a nitrogen deficiency.
I would say also potassium and/or magnesium.
The pics you sent are the older leaves, correct ? Are the new leaves healthy ?

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PostPosted: Mar 29th, '19, 20:43 
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SebZ,

The plant has pretty much quit growing, those were older leaves, but even the newer leaves are affected.


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PostPosted: Apr 2nd, '19, 06:57 
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You probably have multiple deficiencies...
If i were you i'll buy kits to test potassium, magnesium, and gH.
This way you'll get an idea of what's missing.
If your fish are able to eat more, You can try feeding more to supply extra nutrients.

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