The fundamental question about herbivory in soft corals is the size of the phyto and/or the species we are referring to. As Claude already said in his post, when aquarists talk about phytoplankton, they talk about those few species that are actually available in culture. Personally I don't know of any study that has shown that any azoo soft coral actually ingests species like Nannochloropsis, Duniella etc. All the stuff that we usually culture is huge, they form particles that are at least tens, some even hundreds of micron in size. However, most of the phytoplankton biomass in the Oceans is made up from species like Synechococcus and Prochlorococcus, which are few microns in size. The size difference is comparable between a steak and a whole cow.
Cheers
Jens
Which is exactly the point I and our phycologist made. There is not many phyto's under 1µl. Believe it or not, Phyto-Feast has Synechococcus in it just for this very reason. I'll look into the other cyano mentioned.
He's also wrong IMO/IME. Maybe in Germany he can't get phyto products that are not clumped, but I can show you slide after slide of various phyto brands from the US that do not clump to "particles that are at least tens, some even hundreds of micron in size." I'm not talking about just our own products but competitors as well. While I have a TON of respect for Jens that statement is off base.
Do you know if Shellfish Diet clumps? :hmm5:
Yes old bottles will do this, and ones not cared for properly.
I can't shed a ton of light on SD, as like I said, I am a RN person and that is where most my knowledge base is formed around in this company regarding our product lines. SD is not a long lasting product, IIRC you get around 12 - 14 weeks. Hatcheries use it well prior to the "best before". That is why we invented Phyto-Feast in the first place, so reef aquarium users can be able to actually use the product up prior to it no longer being acceptable to use. SD does not have all the species PF has, like Synechococcus.
I'll ask in the AM, besides me, the only other people here are the ones harvesting the phyto or bottling RN products.
www.shellfishdiet.com
FWIW we're working on yet another Phyto product that should interest you![]()
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Finally starting to get a little polyp extension...just a little...but it is progress.
Mike