Hello, I have a strange situation that I would like some help with. I have a 10 gallon goldfish tank. I usualy hae 4 goldfish and a picasimus. When I fist started the tank 3 years ago I also got 2 mystery snails. One died but a bout a week later I had dozens of tiny snails roaming around in my tank. I think eventually they all got caugt in the filtration system because they slowly started to dissapear. after a year I accedntally killed al the fish by cleaning the tank after cleanng the bathroom. I got new fish but never got any more snails. Some how in the last two years I have killed my fish twice (the picasimus always survives) this most recent time was about 3 weeks ago. I compleatly drained all the water but did not rinse the rocks this time and added fresh water. My picasimus has been living happy but suddenly I have about 2 dozen tiny snails in my tank. I have no clue how they got there dose anyone have any idea where they came from?