Hi there
Can please add the "infinitefluids" mod? I think could be helpful.
-Name: Infinitefluids
-Link to the mod: https://minecraft.curseforge.com/projects/infinitefluids
The "InfiniteFluids" makes what you make a pool can be endless, the lava now can be infinite in a pool 2x2, 4x4 ... etc. also works with other mods that add fluids adding the id of the fluid in the mod options. Now in the version for MC1.12.2 works for server modifying the .cfg file of the mod. There's not much to say, that's exactly what the mod's name says.
Thanks.