This. There are so many comments on here that aren't even remotely close to facts or are basically opinions and its ridiculous. I'm not bashing or anything it was a really good idea for a thread but without someone going through and cleaning everything up / fact checking and researching everything the title of this thread is misleading.
I think you'll get some of us posting for fun, that's the nature of an open forum. + you get some intolerables but again the nature of forums. so why can't we all be friends??!!
don't wash your hands with soap & then put your hands in your aquariums for whatever reason you need to do so (w/c, moving/cleaning substrate/plants/filters/heaters/decorations, etc.).
never ever forget to have a lid/cover over your tank especially if you keep arowanas and if you do do not put a cover that is heavy cuz the fish will still jump and will die....