100% agree.Waste of money if you are feeding NLS, but feel free to give it a go. Been there, done that, decades ago.![]()
Astaxanthin gets a lot of buzz these days and is already there in quality foods by virtue of krill, shrimp, salmon, algae, or similar ingredients, along with the other color (and health) enhancing nutrients most people don't pay as much attention to.
Food with quality ingredients (not chicken meal) + really clean water + good lighting + tank size, scape, and tankmates that suit your fish + decent genes = good color. And by lighting I don't mean blue-exaggerated lights. Clean water and lights (or bulbs) with peaks at good spots in the spectrum can make your tank and fish look HD.
For example, this (as I understand it) is one of algae species in NLS Algaemax:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7333709/
Haematococcus pluvialis is a well-studied alga with the highest known level of astaxanthin accumulation and thus is widely used as an industrial source for natural astaxanthin production.
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