My husband and I just bought a house with a spa. My children were in it, after they got out they said that they felt all itchy and prickly. What could this be?

How soon after getting out?

Have you used it and felt this way (and if so, see question #1

How long until this feeling went away, and was there any discoloration of the skin?

Do you know the temperature of the water, and the Ph reading?