This uses the same hijack as the scrollz patch.
STX $0330 : JSR scroll : JSR liquid : RTS.

$005A bytes bank $80.

Very useful depth of liquid water damage w/no gravity suit.
Commented for easy modification.

Only tested in two different sized rooms with water.
I'm pretty sure I got it calculated, or I wouldn't be posting it.

Also saves a bunch of time & space doing this for a new suit.
Not sure if code here will override existing suit code though.