of the loops 22 and 24 and is provided with velcro trademark type hook and loop fastening means along overlapping edges 42 for detachably securing around the loops of the carrying strap referring particularly to fig3 the holder is constructed in a manner and configured such that it may be preferably formed by molding of a suitable plastic material the holder can be configured such that it can be molded for example by injection molding or by vacuum molding it is also of a configuration and arrangement that can also be constructed of sheet metal for example by either stamping or by a combination of stamping and welding the holder as generally shown for example in fig3 and 4 comprises a main section comprising a generally rectangular curved member 28 curved to fit the side of a tank and provide a center with a plurality of elongated drain slots 28 these drain away water from the tank and permit air to circulate to the surface of the tank to dry it and reduce the potential for corrosion each end of the cradle member includes identical pairs of strap slots arranged to accommodate both the tank strap and the carrying strap these include an outer pair of slots 30 and 32 for receiving the carrying strap with an intermediate pair of slots 34 and 36 for receiving the.