Great preset!
I think this is meant to go in the Presets section, as there is no biography. Character biography topics go in the Characters section.
As for the with/without algae and/or diatoms question, what do you want your character to look like as you run around Feralheart exploring maps and meeting people? I asked myself that question while I was making Gui.
If you like, you could export both versions of your preset and switch to the clean version when he cleans himself.