NLS is not much better than Tetra, it contains 15% ash and that is very bad. I prefer Omega One but there are other Low Ash fish foods. NLS is also based on fish meal, not spray dried fish.
These are great for baby fish from what I have heard (I always use BBS) but may not be good for adult fish. Adult fish needs different nutrients than fry.
I'm not telling you to use different foods but I am just letting you and other people know what they really are feeding to their fish.
I'm not sure where you're getting your info from for sure but I have my jar of NLS right here and the
maximum amount for ash is
9%.
As for Golden pearls I use it as part of a food mix I make for my fish because of the Astaxanthin content and occasionally I feed it directly to my small fish.
Honestly, I have never liked Omega one I have used it in the past and the only way I got my fish to eat it was mixed into my food mix in powder form. I mostly rely on my own mixes to enhance frozen or live foods NLS and Boyds are the only pellets I use as a "leave it alone" food so far ( they also get ground up into powder as part of my mix ). I didn't trust the Boyd's at first till I watched the growth of some fry I had which doubled their size in a couple weeks if that when I tried it out. I was sold then and honestly didn't have much faith in it just wanted to try it as the analysis and contents seems up to par, and they were.
After going to a seminar on fish nutrition presented by Rosario LaCorte a few years ago and trying his tips for a year, I wrote an article on fish nutrition and types of food to achieve certain factors ( I.E. bringing out natural coloration, preparation for spawning, and general health of via proper feeding ). If I can find it I will be more than willing to share it. I am not one to take someone's word for it when it comes to fish and I draw my conclusions from personal experience and found what works for me and my fish.