Abstract: A conduit and float gauge apparatus is provided for use with a tree placed in a water-retaining cup and includes a conduit unit which includes a bottom end portion that is placed in the water-retaining cup. One or more connector assemblies connect the conduit unit to the tree, such that the connector assemblies stabilize the conduit unit in a vertical orientation. A float assembly is housed within the conduit unit and includes a flotation member located within the bottom end portion of the conduit unit. The float assembly includes a riser unit connected to the flotation member. A gauge assembly is connected to a top riser portion of the riser unit. The conduit unit has a linear length sufficient to permit a person to add water to the top end portion of the conduit unit without bending down, getting on one's knees, or sitting down on a floor. The bottom end portion of the conduit unit and an intermediate portion of the conduit unit are oriented with respect to each other at an obtuse angle.