I noticed that I get a bit of lag when looking at Itanks when fluids are inside of them. My fps is usually at 300ish but the tanks causefps to drop to 180ish.

Hmm thanks for the feedback, I look into it and will see if I can optimize the rendering / logic

Took me a while to figure out this one. But with my new fluid renderer we are now running at stable 60FPS with a chunk filled with tanks stacked all the way up into the sky.
https://minecraft.curseforge.com/projects/itank/files/2563387