raising fish

About (not) consuming fresh raw fish and fresh raw egg yolks
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johndela1
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raising fish

Post by johndela1 »

I've been playing with aquaponics. A fish tank is used to water hydroponic fruits (cucumber, tomatoes, and melons for now). I feed my fish black soldier fly larva which are good fat and protein sources. I feed the bsf my scrap food (peels, egg whites, shells, coffee, etc)

I can easily raise Talapia. I was wondering if anyone had any recommendations on a good fish to farm using fresh water. I plan to move the system outdoors this summer and get some big fish with a large pond. I plan on looking into salmon but am wondering if they need a salt water cycle.

any ideas on fish to try?
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RRM
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Re: raising fish

Post by RRM »

Tilapia seems to be an 'easy fish to farm', so that might be a good choice, indeed.
Also because it needs relatively little space, as its small.
there is a lot of info on the web.
Source Tilapia feeds on phytoplankton, but you need 100 kg of that to raise 1 kg of tilapia.
Per hectare that will yield only 200 kg of tilapia per year.
Because of sunlight exposure, the algae may multiply exponentially,
which leads to nutrient exhaustion and subsequent die off.
And that will cause poisoning of the water by ammonium, and a massive loss of fish.

If you are thinking about farming salmon,
also consider the factor of parasites.
I think it would be best to deport their waste (sewage) through the regular
sewage canals, to prevent any spreading of parasites.
If they get infested with parasites, of course you can still eat them,
after having deep frozen them previously.
And what about the feeding?
They are carnivores, and you would need to feed them small fish like mackerel and sardines,
and It takes about 2.5 kg of fish to raise 1 kg of salmon.
And how do they get their physical exercise?
that would take a really, really big pond...
Atlantic salmon do not require salt water

It seems that its best to use a variety of fish,
so that you tap all available food sources in the pond.
johndela1
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Post by johndela1 »

I am raising gold fish for feeders, but black soldier fly larvae are good food for carnivorous fish as I currently understand it, I haven't yet tried this.
johndela1
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Post by johndela1 »

I don't have any plans on raising Salmon yet. I wanted to look into it, but that wont be for a while. If I can't raise health Talapia then I'll give up.

If I do raise healthy Talapia then I'll be looking for a fish that is more of what I want. Something with high fat content. I live in southern California and am thinking maybe there are no high fat fish here because it isn't as cold as other places...
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RRM
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Post by RRM »

Yes, indeed. Good thinking.
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