Possibly because sand will compact down about a half inch once the weight of the water is added and the styrofoam won't compact under the weight of the water? Just an uneducated guess.
Possibly because sand will compact down about a half inch once the weight of the water is added and the styrofoam won't compact under the weight of the water? Just an uneducated guess.
Sherra
Kershaw County South Carolina
18x34 IG 2' radius rectangle vinyl liner (approx 27,500 gal) 1 1/2" pipes installed March 2006
(previous AG pool owner)
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