mkseven said..
Heard about using anti dandruff shampoo as cheap preventative with bjj rolling. Never got ringworm from salt water but a couple of us used to get skin breakouts from sailing especially after rain.
Might be worth you seeing a dermatologist, yeah salt water carries crap loads of pathogens but maybe it's just altering your skin pH or dryness favourably for existing skin flora? If that's the case any extra soaking/treatment of swimwear could be making problem worse.
Saw a dermatologist, that is what he said, normal flora growing, but it was not, bleached all shirts and sheets and it went away.
I am now using pyrithione zinc dandruff shampoo to scrub my chest with a microfiber cloth, that is where I typically get it, and that has cleared it up. Probably start doing it after whenever I get in water, saltwater bay or freshwater swimming pool. The scrubbing also helps to remove dead skin cells, and that is what the fungus lives on.