Is there a fluid Reactor Design thread? I didn't find one. I suggest the following changes to the Reactor Design thread, to make it a one-stop shop.
a) heat units next to the EU units on the reactor description
b) a section for fluid reactors, or maybe for reflector reactors.
For example, the "efficient 0-cost reactor" is 912Hu/s, and the "high-power 0 cost reactor" is only 920 Hu/s, so the efficient one is nearly as good.
My first entries for the Fluid Reactor section are these.
EU/tick: 240 HU/tick: 936-1356
Credits: (someone else, I've just kept a pic around for years)