Hi everyone, im a new pool owner and this is my 1st question after reading through this great forum. I will post more pictures & info on my pool as soon as I get an opportunity, but here's A little background on my pool situation. I drained and painted my pool (I know, I went low budget and probably wasted my money) and im getting ready to start filling it this Friday 3/29. after researching, many people recommends adding a sequestering agent like GLB sequa-sol but some people also recommends a metal/scale controller to be added while 1st filling. my question is, are they similar or 2 different product? do I need both or just pick 1? thanks in advance