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 Post subject: Aquaponic garden help
PostPosted: Dec 12th, '18, 11:20 
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I’m going into my 5th year still trying to make my Aquaponic system produce vegetables. I can’t grow much. All of my vegetable plants whether by seed or starter plant are beautifully green with some flowers, but no vegetables. The water is crystal clear. The fish are healthy and fat (Gold Fish). The water quality is within all acceptable ranges. I don’t know what to do next. Any advice offered will be greatly appreciated. My garden only has 8 grow beds and they are about 15” deep x 40” wide X 48” long. Grow media are clay pellets. Water cycles 15 min. per hr. This is a flood and drain system. I have one 275 gal. fish tank above ground and one 275 gal. sump tank in the ground. The fish are fed once a day, in the evening. Only rain water is used. I’m looking forward to hearing from you.
Thanks for your time,
Gil Jones


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PostPosted: Dec 12th, '18, 13:42 
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That's a fair chunk of GB surface area, how many gold fish in the system?

What is the water pH and average daily max & min temps?

What is your Nitrate reading?

What do you feed the gold fish?

What sort of vegetables are we talking about?

What % of your GB area is leafy greens and what % is fruiting plants?

Are any of your plants showing symptoms of nutrient deficiencies?... If so, do you have any pics?

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PostPosted: Dec 13th, '18, 03:10 
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I think Mr. Damage is on the right track with his questions but I'm going to ask a couple more that aren't really specific to AP.

What is your lighting like, full sun, shade ... :dontknow:

Sounds like you get blooms but they fall off, are you in an area that gets much air pollution?


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PostPosted: Dec 14th, '18, 08:38 
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Thank Y'all for responding,
I will send all the additional info I can with pic's but probably not until Saturday.
I live in Southeast Louisiana, the grow beds have full sun


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PostPosted: Dec 14th, '18, 09:49 
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What do you feed and how much? it's possible you have a potassium or phosphate deficiency that would limit fruiting. If you use rainwater, you probably add something to keep the pH up. If that's potassium, then it's unlikely you have a potassium deficiency.

Another thing I've found is that some varieties of plants tend to do better in AP than others. For example, I've found some eggplant varieties put on lots of growth with little fruit while another puts on lots of fruit. I've had similar experience with tomatoes and cukes. My experience isn't scientific experimentation but it just seems some varieties are more consistent producers.

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PostPosted: Dec 19th, '18, 07:03 
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Thanks for your patience. I'm working on gathering all the info I can.


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PostPosted: Dec 22nd, '18, 05:23 
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The water pH 6.0+
The high pH 7.4-
The Ammonia 0 ppm
Nitriat 0 ppm
Nitrate 160 ppm
Water Temp High 74
Water Temp Low 60
I Feed my fish Trophy Fish Feed, Multi-Species Formula. During the winter months once a day in the afternoon.
I've planted an asortment of vegetable plants over the years. The only productive ones have been Cucummber Plants. If any other plant did produce furit or vegetables they were small. The flowers would be plentiful but they would fall off and all that is left are green leaves.
I have taken some pictures but I don't know how to upload them.


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PostPosted: Jan 6th, '19, 10:07 
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>> I have taken some pictures but I don't know how to upload them.
instructions here Gil > viewforum.php?f=4

I thought you had posted pics in past threads, just remember to reduce the size to under 900x900 pixels.
(If using windows simply use the snipping tool to screen grab at the correct size - that is pretty simple)

my thinking is that you have heaps of nitrates in the system but not enough other elements.
And with the nitrates up high this can also lock out other elements.
So basically you can support your grow beds since Nitrates are >100ppm.

One thing to try is to supplement with some weekly foliar feeding. You have the leafy green element.
You probably need to boost the other elements in your system.

>> Only rain water is used.
rain water is somewhat element limited - it may also be you have a lack of buffering in the system (Ca).
This would be reflected in a GH / KH test if you have a local aquarium/spa shop that does water testing.

I run goldfish based systems and to be honest with a lot of plants I get better results from wicking beds.
There I can revert to pulverised manures and add in AP water etc.

My AP classic beds have always delivered well on leafy greens, Asian veg, cos lettuce etc. < these mainly just need the nitrates.

I had to go to dutch buckets so I could add blood & bone & potash to get decent tomato growth.
Maybe you are finding the same thing.

the other thing that Earthbound mentioned in the duplicate thread -> pollination may be an issue.
particularly if it is in a shade house or greenhouse.

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May the fish sh*t and the plants grow.....


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