"Lithium processing" technology unlocks "Lithia water -> Lithia salt (lithium chloride)" recipe, but I couldn't find how to get "Lithia water" fluid in Helmod. After some investigation I found out that "angels-water-void-lithia-water" recipe is disabled, so I guess "lithium-chloride" recipe is also meant to be disabled because it is replaced with "algae-brown-burning" recipe.

I'm not seeing that recipe unlock. Can you upload a save file please? So I can sync mods and settings to it. Thanks.

Thank you for your response. After investigating the issue further, I have determined that the problem is not with Seablock but instead is caused by "GDIW - Gah! DarnItWater!"
https://mods.factorio.com/mod/GDIW

I apologize for any inconvenience my mistake might have caused. I should have tested the issue on pure Sea Block first apparently. I will proceed with addressing it with author of GDIW.

Thanks again for the great work on this project!

(deleted - accidental double posting)