Well for the record, PP is not a descaling chemical, per se, its an oxidizer. I know of a chemical that sounds similar to PP that is used for descaling metal but its certainly not potassium permangante. PP is used in sanitizing of things as well as a host of other uses daily in industry. Its used to clean metals not descale......
Its also one of the most if not most widely used oxidizers for cleanng nets and other equipment in the aquaculture industry, and is totally safe.........and no worse than anything else if its use properly. You can kill a tank full of critters with vinegar as well.........Were not talking putting it in the display tanks, although it can and is done........as its an approved remedy for a lot ofvarious fish helath problems, but were tlaking abut clenaing equipment with it, and for that its perfectly safe, since thngs are followed by a rinse, and within 4 to 6 hours the stuff is inerted by its own oxidaitn process anyhow, no matter if yu rinse or let it dry on the item its still inert. Chlorox once dry is also inert. And wasshing in chlorox is not any worse than washing in chlorinated water and allowing to dry., Wash in chlorox, rinse well and allow to dry, and its safe as can be.......No sense being paranoid. Being totally unfamiliar with such things like chlorox cleaning and PP is not a reason to knock it.
IIRC the pro net stuff is a stock solution of PP.....or it contains PP. I think some folks really needs to read the online papers put out by some universities like University of Florida, marine biology department or Auburn University, Fisheries Dept , and see exactly what you can and can not do and how to do it with chlorox as well as excellent info and directions for using potassium permangante instead of being in the dark about it and just putting it down for no reasonother than lack of knowledge on it.
If you can't rinse a simple thing like a net or a bucket after cleaning with PP or chlorox and do it right, then maybe fiddling with fish is not cut out for you either.
There is very few critters PP is not good for or at least not in the standard dose rate. I can rid my health problems almost overnight with a PP bath or treatment in a QT tank a lot quicker and more efficient than most so called suggested meds and cures, along with water changes....I know of a few folks that dosed their entire display tank along with its inhabs with a 2ppm dose of PP and the only problem they encountered wsa lobsters and shrimp do not like it, everything else came out loking good and parasite and disesae free......They had an anen=mone that had some kind of brown jelly rot, and it oxidized it right up and cleaned all undesireables out of the water...So don;t know PP until you know about it and how to use it, as its well worth getting familiar with it as it just like lemon juice or vinegar or a wrong salt mix ratio can be good or bad, if you do not know what your doing and working with PP is not hard......I can clean up an algae bloom over night with PP. I know its off the original topic of using something to clean equipment with but my point is PP is safe if you follow directions, and no more dangerous than anything else can be, so if your not knowledgeable with it don't knock it.
I use between 250-400 pounds of PP in my ponds and aquariums annually.....and have been for years on end.......and have yet to have a death associated with it or any other problems. If a fish dies with a PP treatment it was bound to die anyhow, and in no way is from the PP treatment....
http://search.ufl.edu/web?query=Potassium+Permanganate