Custard filled pool

[BurlesqueAl]

Hi everyone,

just back for an amazing weekend of sploshing.
But have a few questions to make my next session even better.

How much custard do people normally use with am infalatable pool (big enough for 2 people)

I'm looking for enough custard so that lying down there a fair amount of it over ourselves (thinking 3-7inches deep)
But working that out seems to be about 100-300ltrs of custard.

Anyone got good ideas on where to get that amount of custard?

I prefer instand powdered custard as its easy to transport & make as well as being able to vary the consistency.

Thanks for any help anyone can give.

Al