I recently replaced some of my plastic plants with real ones and have been using JBL Ferropol plant fertilizer, I have been told it is fine to use with Amano shrimp as the copper content is so low (mine have been fine with it so far) however today I purchased some African Dwarf Frogs only afterwards realizing they too dont like copper, are they going to be ok with me using this fertilizer? Im not sure how sensitive they are compared to shrimp?