It can. If you use too much Pink Treat and not enough chlorine it may make it difficult to get a reading. If that happens, don't shock. Just chlorinate as normal until the reading returns.
You should only use Pink Treat when you have pink bacteria/slime or white water mold. To prevent pink bacteria/slime and white water mold we recommend using No Mor Problems.
Pink Treat can sometimes interfere with chlorine readings. If that happens, don't shock. Just chlorinate as normal until the reading returns. Usually this is only a few days, but can last up to a week. You won't get algae in the meantime.