Thanks for tagging us! Here is the size chart with nutritional analysis information. We are changing the chart today so that the products are in order by size. Here, the first 3 are highlighted (Small, Med. and Lrg.) because those are the sizes most familiar to hobbyists. The smaller sizes (A, B1, B2 and C1) are mostly being used as a weaning diet in finfish aquaculture, but these sizes are also appropriate for many different types of corals. I have inserted a coral feeding demo. The coral in the video is consuming TDO A (75-250 micron). We are finding that more and more people are target feeding their corals with TDO because of the great digestibility and scientifically proven color enhancer (Haematococcus pluvialis). This species of algae produces a carotenoid called astaxanthin. This compound results in dramatically better color in fish and corals, especially those animals with red pigmentation. Carotenoids are also great anti-oxidants.
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Any of these good for feeding BTA's?