What multivitamins for fish ?

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Yes, but it's the caiman, piranha, carnivorous catfish, carnivorous plecos, etc. cleaning them up and eating them, not discus, severums, oscars, etc. :)
Ya I think that’s mostly true although I imagine those cichlids will pick at the carcass if they come across it, but I agree that mammal meat shouldn’t be the staple
 
Feeding beef heart has been proven to be benific for the fish by scientifical studies. I agree, they do not eat beef heart in the wild. Feeding beef heart is not for the beef but specifically for the proteins. They need clean protein without any fat. I agree it is not natural for them to eat beef heart mix, but would you agree with me that a thousand years ago humans were living 50-60 years instead of 90 and why ? Because they evolved and found some better food and habits for their health to improve just like its happening with discus.
I dont know about other fishs but for Arowana and Discus wich are very colorful fishes, they need vitamins to be healthy and specially the discus because they are fragile.
Thats why in the beef heart mix there is beef of course, salmon, shrimps, multivitamins, spirulina, spinach, garlic, carrots and more. That way they live healthier, bigger, longer and happier.
My opinion is, maybe non-natural feeding is a change for them but its good.
 
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My opinion is, maybe non-natural feeding is a change for them but its good.

No offense but there are a few hundred years of collective experience that have responded to this thread and none support your opinion. It's because you're incorrect. 50 years ago some of us believed as you but not anymore.
 
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Then i would like to ask why the world most healthiest and renowned discus (and im talking about 20+ company listed on discus.com with premium genetics) are all fed with beef heart mix with added vitamins ?
There is alot of fans of wild discus too and they still are fed with beef heart mix
 
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FYI - in the past I have corresponded with some of the researchers that oversaw many of the studies involving discus, protein, novel sources of starch, etc.
Researchers such as Alex Chong. Beef heart is not required for optimum health in discus, nor is high protein levels, once the fish are beyond the juvenile stage of growth, the same as most cichlid species. Beef heart was used because it was cheap, and back in the early days of collection it was something that the fish would accept. Simple as that. Now we know better. I recall when secondhand smoke was not considered harmful, too. lol

How many of the folks that feed beef heart , have discus that are 10 yrs of age, or better? I was once told on Simply that the average lifespan of the members discus were 3-4 yrs. They all fed beef heart. Most of those folks changed their pet fish discus, for a new color, or strain, more often than I buy new underwear.

Good luck with your fish.
 
What would you recommend to feed them ?

The young Stendker in pics below, were all being fed 1mm New Life Spectrum Cichlid pellets. Those fish were just a small sampling of discus being kept by a local old school discus breeder, with a 2,000+ gallon fish room. In years past all he too fed was beef heart mixes. But he was open minded enough to learn new tricks as he got older. He was amazed at the results, in the fish, and how much higher his water quality stayed. No more daily flushes of warm beef water! He had a massive storage tank for his auto water change system, but he ended up going from his past daily water changes, to weekly water changes after changing to the NLS pellets. And once converted to pellets, they hammered them as hard as any fish that I have seen. As a treat, once a week he fed blood worms.

But there are scores of different commercial foods, frozen foods, freeze dried foods, etc, that one can feed, that will supply all the amino & fatty acids, vitamins, and minerals that a discus will require for optimum growth and overall health.

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