It has been really nice here but suppose to heat up later in the week. I found that my chlorine was a bit high in the pool, and testing the acid, I read it wrong. I thought it said to add acid, so I did. That lowered the chlorine, so I added chlorine. Then it said to add more acid, so now my pool chemicals are really messed up. I've cleaned the filter 4 times, quit adding anything for 3 weeks, and still high on acid. I finally bought an accurate drop kit, and will throw away them dumb test straps.