My C. Atabapo has had some pitting despite excellent filtration and frwquent large water changes. It seemed to help when I added some Vitachem to the water. I was wondering what anyone here thinks about adding human grade liquid multivitamins like <<http://www.vitamins-nutrition.org/vitamins/products-reference.html>> seems like human grade would be better. However I am slightly concerned it may contain things not applicable or harmfull to fish-please give feedback. Thanks. Greg.