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PostPosted: Jul 8th, '18, 01:10 
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I've built my first aquaponics build.

I'm hoping it will take some load off my present NFT build.

Now figuring out how many fish to put in here.

I believe there are some channel catfish about an hour drive from here.

How many fish do people generally stock in this size?


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PostPosted: Jul 8th, '18, 03:05 
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This should help with figuring your fish stocking levels - http://www.backyardaquaponics.com/forum/viewtopic.php?f=12&t=6646

Remember this is based on the maximum size you intend to let your fish become.


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PostPosted: Jul 8th, '18, 04:40 
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Sounds good.

Based on 300 liters of media, I'll start with 10 baby catfish and try to grow them to 9 kg total.


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PostPosted: Jul 8th, '18, 09:14 
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I've had trouble finding a local source for catfish food though.
Wilco, LJC Feed, and Walmart all had feed for Koi and Goldfish.

Is this common?


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PostPosted: Jul 8th, '18, 10:00 
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Unfortunately, yes. Most of the demand is for trout feed because the water is so cool here it's better for growing trout and catfish grow slowly with the cool water. In my experience they are more susceptible to disease because of this as well. I have had better luck with Bluegill but given the option I'd go with trout or yellow perch. Trout if you can get the temps low enough and yellow perch if you can't. Bluegill are a good choice but are relatively slow growers in cool water. Yellow perch is more of a cool water fish but isn't legal to transport here in Oregon, maybe it's different where you are :dontknow: .

Give the catfish a try, they may work for you and they are pretty fast growers even in relatively cool water.


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PostPosted: Jul 9th, '18, 08:50 
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I will monitor the water temperatures.

I wouldn't mind trout if I have cold enough water year round. I had a permit for trout in my backyard stream years ago.


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PostPosted: Jul 14th, '18, 08:05 
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I added 10 baby catfish this week. I have moved some plants to the new bed.

On the whole, though, this may not be successful.

I don't see the new fish all that often. I see occasional glimpses on the side. Mostly because there is enough tannin in the water that I can't see all the way to the bottom.

I've tried to use Purigen or Activated carbon to filter out some of the tannins. It might work if it weren't so outnumbered. The advice they give is to remove woody debris. The woody debris just happens to be my planting media.

Cedar chips were a bad idea, and being consumed by work, I'm not sure when I can redo it.

The Aquamax Pond Feed 2000 is a bit big, and I am breaking it up. I might find some smaller pellets.

I am supposed to feed them what they can finish in 5 or 15 minutes depending on what publication I read.
Trouble is, they don't come up for food. Perhaps they weren't trained to do that; perhaps they can't see or smell the food with all the tannin in the water.

pH was 7.2 when my daughter last checked.


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PostPosted: Jul 14th, '18, 14:39 
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First off never expect them to come up if the water is cold. Right now it's warm enough that they will come up but they'll need some time to get comfortable in their new surroundings. If they get hungry that helps encourage eating as well. If you moisten the feed a bit and then give it a squeeze you can remove enough air that it will sink just be careful not to let uneaten food accumulate. If they stop eating, stop feeding regardless of how long it says to feed. The warmer it is the more they'll eat. If they aren't eating, something is wrong so you should look at the water parameters and conditions in general.


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PostPosted: Jul 14th, '18, 20:49 
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I've had great luck ordering catfish food on Ebay doing a search like this" "1/4lb - 20lb" SINKING FISH FOOD PELLETS- Koi/Catfish/Goldfish/bottom feeders"

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