I always use SFB mysis since it was slightly larger than Hikari and my ponies do not like PE, (I think its too big for their preference). Anyway the last cube packs I bought of SFB mysis was miniscule. It would be great when weening off seahorse fry from live artemia because it is slightly smaller than that! Unfortunately its not suitable at all for mature ponies used to eating much bigger mysis. Has anyone else noticed this or maybe what I bought was an isolated incident?