For basic blueprint: hit the angle just right on sparkle in the hydro plant to fish it up (must have fishing rod crafted in inventory) north of the blue print
Advanced filter blueprint bought in underground for 20z
To find Basic: hit the angle just right on sparkle in the hydro plant to fish it up (must have fishing rod crafted in inventory) north of the blue print\
To find advance blue print: purchase it for 20z in the underground
