Anyone use aquavirto fuel

[Proteus]

Wonder if anyone has tried this product. My tank runs pretty lean and have small bioload (fishwise).
I do use a few zeo products but don't know if they are as good as some claim. I do like sponge power and coral snow. But not sure on vitalizer or phols extra.

I did some reading on fuel but am hoping it's not crap like there salt