fish put on weight impressively with beefheart.
Yes it had been used for a long time in discus rearing.
Personally i do not advocate using such rich food for fishkeeping. It is something unnatural for the fish in the first place. Discus dont eat cows in nature.(most other fish for that matter)
Now there is something more than just being unnatural....as someone can argue that fish dont eat flake food in the wild too. The real issue is that food as such are too rich for the fish. numerous experiments had already proven that fish fed on excessively rich (not just fats but proteins ) food have high tendency to develop fatty tissues that accumulate and even press against vital organs of the fish. Even if we cannot be sure if the fish is in pain, it certainly is not healthy.
the perspective in show discus breeding is different. shape and form of the fish is a very important aspect. And large robust looking fish are desired. beefheart can provide the growth they need.
It all depends on your perspective on fishkeeping. "naturally ugly" or "unnaturally nice" ?
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