I usually run this whenever I am expecting guests over the weekend and if I expect them to come checkout my fish tank. Running it for a few days polishes the water and this is a part of my toolkit to get my tank ready for "display" (algae scrubbing is the other big activity :)). Remember to dispose it after a few days, otherwise they clog up and overflow the HOB filter (made that mistake twice so far and a mess to cleanup afterwards)
Great that you can cut to size, works great
My order arrived well packaged. This is a great price for the amount of poly pad you get. So far I have used some to replace the cartridge in one of my HOBs and have plenty left over!