Review on Seachem 116038706 Safe 1 Kilo by Jenn Plata

First off, it stinks. Poorly. All reviews were confusing. I don't know anyone with a 300 liter tank. I wish the instructions were more specific. The bottle only says a quarter teaspoon, some reviews warn about overdosing so I didn't want to treat 300 gallons in a 60 gallon tank. Followed the instructions, killed half my fish. I'm glad we went for 1st tank and didn't go to #2-5. It would be terrible to kill all my fish. I'll stick with what I know for now and not risk killing fish anymore.