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.
Using the proper swimming pool chemicals and techniques will allow for better pool water chemistry. Allow the water to fully circulate, usually 8 - 10 hours, then re-test your pool's pH balance. Please refer to the chart to see the amount your pool needs to raise your swimming pool pH level. Take care in using sodium bicarbonate as it tends to affect both the swimming pool pH and total alkalinity.