Single/multi-choice problem: Which of the following solutions is better for the following goal:
How do you vacuum detritus off the surface of the sandbed in an aquarium?

Select from the following. (I). The easiest way to clean detritus from the sand in an aquarium is to use a long, flexible piece of plastic tubing. Start a syphon, and use the tubing to vacuum the bottom, syphoning the dirty water and detritus into a bucket to be disposed of. (II). The easiest way to clean detritus from the sand in an aquarium is to use a long, flexible piece of plastic tubing. Start a syphon, and use the tubing to vacuum the bottom, syphoning the dirty water and detritus into a bucket to be added back to the tank.
(I).