this can be dependant on viv floor space. 50/50 is my ideal ratio. this just gives the toads the ideal scenario for them to utilise. the toads demeanor can vary a lot, some spend more time in the pool, others land and some both. as you get larger in volume the pool/water area can be lessened to a smaller ratio as long as there is the option to excercise and swim if need be. to small a land gives rise to "spoilt" toads that get fed by hand/tongs and such due to wastage thru drowning when food is given. pool depth: 4" as this lets them have some degree of swim area and they are quite comfortable resting with nose above water even tho rocks/plants should be placed too.