tingly water

A few nights ago, my husband and I noticed tingly skin while we swam. I had just checked the ph and it was 7.6. The next morning I noticed green algae in small clumps on the bottom of the pool. On the sides were sheets of clear, tiny bubbles that were slimy when I touched them. I shocked my pool today and am keeping the chlorine high. What caused the tingly skin? and what is the cause for the bubbles? My readings today are as follows:
FC 18.5
CC 0
PH 7.4
CH 250
CYA 70
Alk 140 a little high, I know, but I am working on it. The FC is holding.
I have an SWG and keep the FC at 4.5
Thanks, Dorie

The tingly skin was probably caused by the chloramines being formed when the chlorine combined with the impending algae. Don't kow about the bubbles...

Janet

Algea gives off oxygen, at least in ponds and fish tanks... figure it does in pools, too.

With a CYA of 70, your FC should be 5-10 and 20 to shock, according to the best guess table.

Grace is right. Algea is a plant and it pulls CO2 out of the water and produces O2 as a by product of photosynthesis. The little bubbles are the O2. Algea in the oceans is a major player in the regeneration of O2 in our atmosphere.
Steve