You need to compress Universal Fluid Cells to get air, and that's what goes in the fluid slot.
I'm working on a way to make fluid slots have a default fluid in in the jei page. However that is quite difficult and takes a lot of time. But yeah, since that's not done, you can't see, that it takes air to work.
I also had some trouble with Dense Plate recipes, added a bug http://bt.industrial-craft.net/view.php?id=1919 - should I have posted that one here first?
It is a bug so going straight to the bug tracker is fine.
What happened to putting chain mail armor in the smeltery to make steel? Still seems like a fair way to do it.
IC2 never added that, it was a Tinkers Construct thing.
Could the Fluid Input and Output slots be labelled on hover?
Would a simpler way of showing the recipe be to show 6 Universal Fluid Cells (Air) in the Fluid Input slot? Or is that too specific?
The problem still remains: currently, I have no good way of accessing fluids, that want to go into a tank...
Actually you have access to that information.
Since the Fluid that is required is hardcoded you can easy access that and the fluid amount that is needed can be accessed in the recipe... So that is no issue...
If that is not helping then change the api...
You're not helping, Speiger. Just letting you know.
