I believe I have read that this "makrolon" plastic is supposed to stand up better to "tank crackers" than polycarbonate, which apparently a lot of plastic tanks were/are made from. I really can't say, because I don't want to maybe mess up any of my plastic tanks. I did find a Quartz kit on e-bay for about $19, and free shipping; I had been looking at the same exact brand of that one on Kidney Punchers, but theirs is $25 I think, and you have to pay shipping, but of course if you order multiple things from one vendor, shipping becomes less of an issue. I always use the quartz tank for my Pineapple Ice.
Filling the Quartz is a bit of an issue, though; because of how the rings are made that fit on the quartz (with o-rings) they stick out more, so partially occlude the fill-hole; I can't get an 18ga needle down it, but I've found that if I just go slow, it will fill without backwashing and making a huge mess. I really need to get a 20ga needle and see if that will fit better.
Andria