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Does it have any additives or fragrances in it? Shake the bottle and if bubbles last longer in it than it does in a glass of water then don't use it. Check the label, should be 100% ammonia or ammonia mixed with water
From what I have read elsewhere, many people have used it without an issue to cycle. You can always call the company to double check on the ingredients and the percent. It's supposed to be 5%.