The eastern boundary of the Louisiana purchase was the Mississippi River, from its source to the 31st parallel, though the source of the Mississippi was, at the time, unknown. The eastern boundary below the 31st parallel was unclear.
An A-frame pool ladder is a great above ground pool ladder designed for stability and safety that is perfect for above ground swimming pools Pool owners with small children can provide an extra layer of safety with the fold up mechanism or locking gate.
First You Should: 1  Bring the pH, alkalinity, CYA, and hardness in line. 2  Brush the bottom, sides, and steps to loosen any algae that may be adhering to the surface.  Purchase a high quality leaf rake, (not those simple blue square skimmers) and scoop out as much debris from the bottom and top of the pool as you can.