Beagle
If I have a bathtub that's 2.5' x 4' x 1.5' -
how many cubic feet of water could bapu draw my bath for?
and how many trips to the terlit would I have to make during one bath?
Is it enamelled metal or glass fibre?
Are you using bubble bath or bar soap?
Too many unknown variables here, how can we help you unless you are more specific.