What is "Jack's Magic"?

[waterbear]

The letter was downloaded from the "for professionals only' section of the Jack's Magic website! It is the form letter (with the Jack's magic logo on a blue background on the left side that starts "Dear Pool Owner" and goes on to talk about some of the Jacks Magic products including Blue Stuff, Purifiber, Purple stuff, and seaquest test kit! (I have access to that part of the site and am looking at the letter as I type!). IMHO, it is simply a marketing ploy! A sequesterant can help prevent stains in new plaster but I think they go a bit overboard to sell the product. If you have metals in your water then you should use a sequesterant. If you don't you don't need one! If the plaster company wants you to use it for the warrenty ask them for how long and then use it to protect your warrenty. Otherwise, I wouldn't waste the money!
Just my 2 cents!