Last week, I got a new plant. I ran it under the tap for a few seconds. Like a quick rinse if anything. Today, I scooped some water out so I could isolate a snail I had, and I was checking it out with a flashlight and saw something moving in the water. Imagine a baby snail. Imagine the size of the feelers. Now imagine the size of the end of if. The very tip. That's how big it was. It was swimming sporaddically. Should I be concerned? What could it be?