So i have a 10 gallon planted tank and i just started noticing little dots moving around all throughout the gravel. Im almost positive they´re not bubbles but I don´t know. They are also not fish eggs as i have livebearing fish (two mollies, two platies). The only other thing I have in the tank right now is one nerite snail. Maybe they were on the plants when I put them in, but I rinsed them off pretty well. Can someone help tell me what these little dots are?