It's strange that nitrite would be high. And that's something you can't afford to mess with - high nitrite will kill your fish if you don't address it.
Since you had a nitrite reading, you need to buy the test kit - without it, you're just guessing whether or not the water is toxic.
Since you had a nitrite reading, you need to buy the test kit - without it, you're just guessing whether or not the water is toxic.