Can baking soda keep baby pool water clean?

we have a pretty big blow up pool (non-filtered) that the kids are now using daily since it's in the 90's and we have no a/c. i've read before about using baking soda in pools, but i think that was in conjunction with chlorine, etc in a filtered pool system. what can we do to try to make the water... show more we have a pretty big blow up pool (non-filtered) that the kids are now using daily since it's in the 90's and we have no a/c. i've read before about using baking soda in pools, but i think that was in conjunction with chlorine, etc in a filtered pool system. what can we do to try to make the water last longer since we can't afford to run up our water bill filling this thing with new water every single day.
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