I am new to STEP and am in the process of installing the CORE mods. During each major stage I have created a toon and ran it around for a while looking for bugs, freezes etc. The last time I did this I noticed that the alchemy fish (Histcarp, River Betty etc. were purple. I eventually traced the problem back to the FoMod for Wiseman303s Critter Fixes. As I am only installing CORE I had not installed Bugs101 HD Support or Pondfish and Salmon replacer but these are selected in the Fomod. Small matter in a big outfit I know but you may want to tweak the guide a bit. Cheers