Hi,
Marine snow is not in a bottle. LOL
There is a product called marine snow, but that is not what the author meant when talking about what zoos and mushrooms eat.
Has anybody noticed their aquarium water is all clear one day and every once in a while it looks like, well...snow. If you run the skimmer it will clear right up.
It is dead particles that float in the aquarium as stuff in the live rock pass away in the natural cycle of life, It feeds corals. Zoos and mushrooms really like it. When skimmers run 24/7 it sucks all the snow out.
The product marine snow is designed to feed coral by the natural means that is found in the ocean, which really boosts the coral growth.
Sometimes instead of running the skimmer...let it snow. It is free. It is normal and it is healthy.
I learned all this when I totally freaked out that my tank had snow. I ran and called my fish guru in a panic and got
his lecture on live rock and the cycle of life.