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Fish flashing

Subject: Fish flashing
by King1968 on 2/1/2021 17:57:49

Hi some not all of my fish have been flashing for a couple of months I've tested the water regularly and all is good I've taken advice from a Guy at a aquatics shop and treated for worms with Fluke solve didn't work tried Kordons ich attack which is a natural treament as I have corys and snails for parasites for over four weeks not working is it possible it could be internal parasites? and could you recommend a treatment safe for corys and snails please,I'm getting really frustrated

Kind regards
Peter Elliott