hiya guys, new to the forum, i have a tropical tank set up thats been set up for about three years now, it has a plec, mollies, platties, guppes and a born sucker. when i first had the guppies they were dying pretty quick, now i have lost all my yellow mollies due to them going really thin then bent and dying a few days after, my female platties are now going thin and bent, and i presume they will die in a few days which is so sad, my female dolmation mollie is the same, im really not sure whats causing this i have lost about 5-6 fish from it, i had my water tested at the start of the week and it was fine, im hoping to go to the pet shop tomorrow to get it tested again to be on the safe side, if anyone can help me with this i would be more than grateful, thank you.