Honestly, I have given up on dermatologists and allergists at this point because they were not helping at all so that is not a concern. I am willing to go with your suggestions because you seem to know what you are talking about. I'll order the test kit. My only concern is emptying the pool. This is an above ground pool so emptying is a major undertaking with risk of collapse. Also, our residential area does not make emptying that much water an easy undertaking that will go unnoticed by neighbors. Is there an option to emptying the pool that will work? Also, when you say to use the dichlor for a tub test, is dichlor a common chemical I can purchase at pool store or online? Thanks