Updated: Jul 2, 2020
"There is a New Life Spectrum® formula for almost every freshwater fish, marine fish, crustacean or coral in your aquarium. The Spectrum family of formulas all feature high-density, quality nutrition from natural ingredients. Formulas come in a variety of jar sizes: from 50g jars all the way to 2000g buckets." -NewLifeFishFood
Official Website; http://nlsfishfood.com/spectrum/
Online Store; https://www.amazon.com/gp/product/B0002E7ITK/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0002E7ITK&linkCode=as2&tag=madeinusare0c-20&linkId=535a247b6921965558e2a82ee0f25877
Product Review; "This is the one fish food that is enjoyed by mainly every tropical (and some non-tropical species) fish I've owned. It floats for a minute, then sinks slowly (and wont dissolve to cloud water) - perfect for surface and deep dwellers. New Life Fish Food makes a huge variety of formulas for different fish - so make sure to get the one right for your tank. -
[Subnote] I'm including a picture of another domestic fish food I've used for Betta fish - they absolutely love it and it's perfect and affordable - but while looking for links online I came across the company (Pisces) selling a "Product of China" version now.. so I cannot recommend. But keep an eye out if you can make sure it's the USA version. -Unless you live in China, then by all means - Always and only support domestic manufacturing!"