what are the signs of parasites? my plec died yesterday and my gold fish are acting funny. they dart to the bottmon of the tank and just before they get to the bottom they flip to the side? in this past week i lost 3 other fish. they were ones my daughter gave to me. she had parasites in her tank but she said she cured it. i never had this much problems before with tanks...just cant figure it out. i have a 10 gallon tank and dont have too many problems with it just my 40 gallon 1 and i do the same things for both.