Can I share a story... I had a volitans that I thought I fed pretty well. He was about 3 when I took him out for hypo treatment in a hospital tank. His hospital tank was right next to my new pricey fish. I had researched diet all to pieces and was applying it to the new fish. The lion, being right next to the expensive fish got a brand new diet.
When I took him out, he was this size.....
When I put him back, he was too big for the tank. This is a three year old fish at this point. He had stopped growing...
There's many steps we fall down on, and it's really really hard to provide a perfect diet. All we can be expected to do is our best and no more.... we just have to make sure we
are doing our best. If one can't afford to toss that or they can't get it easily, that is understandable. That means this month, the best you can do is provide food that's not "all that and a bag of chips".... but that's OK, if that's your best, you know what I mean? Have I knocked the ice off of a cube of mysis? Let it thaw just a little too long at room temp? Let air get at the open package. Yes. Yes. And yes. One time I fed out a questionable guppy and I swear the angler died the next day. He was perfect and established, so I'm not sure if it was me or not O.O As long as subpar doesn't become standard, everything will be fine.