Im probably going to get hated on for saying this.. Do a couple 100 percent water changes, add charcoal to your filter, let run a couple days, change it for fresh, get a few danios and put in your tank to test the water to see if it is safe. Its really the only way to tell and with that minute amt of surfactants, I dont think its advisable for you to have to tear your tank down completely and/or get rid of the expensive stuff you have in it.