I've just read the result and method part of this article and it sounds very reliable. The experiments were done at AIMS (
https://www.aims.gov.au/).
Unfortunately they didn't test any products on the market, but used unfiltered sea water for one, live Isocryssis and a couple of coral foods developed at AIMS (same as in this article
https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0207956&type=printable ).
The cool part was that filtered water with live Isochryssis gave higher weight gain then the unfiltered sea water(and filtered water with the other types of food). They used 300 frags of each three species (900 frags). Isochryssis "won" for all three species in the category weight gain.