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so I think that I over exposed myself to MPS in those initial months. I've read that it takes less and less MPS to iritate your skin if you've developed a sensitivity to it.I will definitely switch to dichlor and see if it helps.
I was always under the impression tha mps is a much stronger oxidizer than chlorine, hence why it is used as a shock.
Actually, I just remembered that it is easier to burn up combined chlorine with mps rather than excessive amounts of dichlor. Maybe that is what I was thinking of.