Do things float better in more water?
the amount of water does not affect the overall buoyancy of objects, at least, that is to say, once the object is being fully supported by the water. That means that there is enough water to suspend the object completely over the base. An object that is denser than water will sink to the bottom (if you assume that the water is pure, of course) at the exact same rate in a 20 liter tank, vs a 200 liter tank, so long as the height from the surface of each tank’s water supply is the same. Essentially, what this means is, they fall at the same rate through the same substance, regardless of the amount of substance present.
