You know those signs you see, that say 'Hazardous Chemicals'. Well, just occasionally, they mean what they say.
Swimming pool hygiene is a reasonably precise art. One needs to have the Chlorine and pH levels just right, or risk the water turning green; just as ours had, on opening the pool recently.
A few years back I'd removed my T shirt to clean the pool, and managed to get some neat pH+ liquid on my sides. They turned red, blistered, and itched like crazy. This year I've managed to do something similar, and my two forearms are covered in red scars and nasty blisters (it's actually much worse than it appears to be in the photo).
I'm usually quite cautious about handling chemicals, but something went amiss somewhere and I'm now paying the price.
On the good side, the water temperature has risen and Lady Magnon has had her first swim (not me yet). As is the tradition in Sweden, I offered to give her a good thrashing with some Birch twigs, but she very sensibly declined.
p.s. As pH (sodium carbonate) is an acid, Lady M has insisted that I spread Calcium-rich Yoghurt all over my arms. So, if you should see some scruffy old codger with his arms covered in Yoghurt, don't point at him and laugh; it could be me... Anything for a quiet life!