There are hardcoded references to the vanilla Blocks.water, Blocks.flowing_water and Blocks.lava. Changing these instead to look for Material.water and Material.lava would allow for compatibility with other mods that implement their own versions of lava and water, such as TerraFirmaCraft.

Specific examples include:

• SubTileHydroangeas line 67
• SubTileBubbell line 51
• SubTileThermalily line 48