Can someone explain to me what the big difference between these two are besides that one has two parts and the other has one. They generally carry out the same purpose right? or am I wrong? The reason I'm asking is because the two part one is twice as much as the one part but they're the same price...please let me know, thank you
This: http://www.marinedepot.com/ps_ViewI..._Additives_Two_Part_CA_ALK~vendor~~tab~1.html
And this: http://www.marinedepot.com/ps_ViewItem~idproduct~KM3237~idCartRow~10458804~isKit~0.html
This: http://www.marinedepot.com/ps_ViewI..._Additives_Two_Part_CA_ALK~vendor~~tab~1.html
And this: http://www.marinedepot.com/ps_ViewItem~idproduct~KM3237~idCartRow~10458804~isKit~0.html



