How Much Water in the Solar System ??

I was told that there is more water below the Earth's surface than on
it. Let me say I'm talking water molecules let it be steam,liquid or
ice. Earth seems to have a 73% water on its surface and lots in its
atmosphere. Was very disappointed when Tempel 1 had a dusty dry surface
like Mercury,Venus,our Moon and Mars. Still the big gas planets Jupiter
Uranus and Neptune have very large solid cores that could have lots of
water. Have a gut feeling time will prove comets do not have as much
water as we think in this spacetime. Ammonia,and frozen carbon dioxide
creates its tail as they get warmed up in closer distance to the Sun
Bert