Hi all, looking for some advice. I have a 10 gallon tank with some guppies, endlers and a couple of snails. All the fish have been itching for a week or so, but have no sign of velvet or itch or any other physical symptoms, except one endler who has become inactive and has lost his vibrant colouring Just in the last day or so. Water parameters all fine but have done a couple of 50% water changes over the last week but its made no difference. I am a relatively new fish keeper so would appreciate some advice on this matter please.