I think the responsible thing is to act on the best information you have available, which in the case of most fish will be their natural diet and maybe some studies on specific foods, but not necessarily specific to your species of fish. What people are worried about is that one person will tell you they’re doing it and it’s “going great!”, then act on it instead of weighing it against everything else you’ve heard to the contrary. It’s called confirmation bias and it’s an easy trap to fall into
For example, I’ve seen people asking about keeping brackish fish in fully fresh water. Seems like these fish are always “doing great!” for about a year before they roll over and die. It’s a scenario I’ve seen play out on forums a few times and I could see this going a similar way
Personal opinion is that you should find the most ethically sourced/sustainable food that meets the known requirements of the fish you’re keeping. It’s the best you can do even if it’s not exactly what you were hoping for. Best of luck
For example, I’ve seen people asking about keeping brackish fish in fully fresh water. Seems like these fish are always “doing great!” for about a year before they roll over and die. It’s a scenario I’ve seen play out on forums a few times and I could see this going a similar way
Personal opinion is that you should find the most ethically sourced/sustainable food that meets the known requirements of the fish you’re keeping. It’s the best you can do even if it’s not exactly what you were hoping for. Best of luck