Aquahot Antifreeze

I noticed that the reservoir for the Aquahot was below the fill mark when I was putting some things away a couple of weeks ago. I am not at the bus so I don't have the manual handy. However who needs a manual when you have POG. What type of antifreeze do others use in their Aquahot reservoir? Low silica diesel engine or regular automotive? Inquring mind wants to know.

LOC,

It probably has regular automotive antifreeze mixed at a 50/50 ratio.

Use caution Loc Nest...... Around 04 they changed to pink Boiler Anti-Freeze, prior to that, it used regular ole green auto stuff. My 02 CC was the green stuff and my 04 CC was pink Boiler.;)