and then your silicone will be permanently stained !

These instructions are very risky in deed.   YOu can't just put some until you think you get the color right!  This will kill fish!  You have to use not more than 2ppm for overnight, and I would never do overnight anyway because doing a PP bath require constant monitoring of the fish in treatment, and I do mean CONSTANT.  Do not leave the fish in there and return 4 hours lalter!  Also you don't just drop the crystals directly into the tank!  you first make a base solution of 1 gram (1/8 teaspoon) into 1 liter of pure water (no prime or dechlorinator) and shake that well, then use 2 ml of this solution per liter of actual aquarium water, that gives 2ppm and leave it for 4 hours max (That's more than enough to kill everything on yoru fish).  In more resistant cases, use 4ml per liter to get 4ppm but keep watching he fish for discomfort.  This is the correct way of doing it.  Once a fish show sign of panic or discomfort, it must be removed or the PP neutralized with Prime.

how much for 30 gallon water do I need remove drift wood

if I wants to used for goldfish. how ppm?

it is very risky guys believe me...use potassium permangonate very carefully...use very little amounts...

what is exact dosage of pp/ Liter for discus fish bath

Wow!!!!