Is this from the aqua log series that you are referring to here?Download the PDFs for the Elasmobranch Husbandry Manual I & II, yhey don't have too much info on fw rays, but it's still very useful as their data is taken from a bunch of aquariums and zoos, they also have some very nice info on medication, quarentine and prophylaxis, overall a recommended read (and it's free, just google it).











