ok, take a quick step back and look at things. Just because one company says its good for a tank and feeds corals doesn't mean it actually does. Example Marine snow and black powder or really most of the two little fishies stuff.
Another thing, if it doesn't need refrigerated how does it not go bad, Are there ingredients that preserve the stuff? If so thats probably not a good thing at all.
Also look at what other amazing tanks are using...are the Tanks of the month using this stuff.... Can't find one that is. Is this product a buzz on the internet....no ..... Is there any proof were feeding anything more then the skimmer other then my corals look better which could be from many different things.?? If it was a quality product with a ot of people using it or people getting amazing results are using it, it would be all over Reef central, and is not. So I'd save the money and get something that has a track record to work.
Dt's seems to have a good track record. But when feeding nonphotosynthetic corals they don't ingest the it. Not sure why, but I have seen it on video through a mesoscope the polyps taking the food in and then spitting it back out. I have seen the same corals ingest another brand of phyto though. reed's phyto feast. Im using the commercial version of that now, shell fish diet. Works great from my corals. I also feed a homemade blend of oysters, some call it the blue coral method. Basically blend fresh oysters for 5 minutes, add some water to thin it and freeze. Super high protein for the filter feeders and small polyp corals.
My 2 cents
Erik