parasites darting

Hello, I have a heated, filtered 5-gallon tank with one betta, four ghost shrimp and several live plants and mosses. Today, I noticed tiny, TINY white specks against the glass. A few of them move occasionally, so I know they're living things. What are they?? Are they harmful? Do I need to...

So...I got two new betta fish. And have had them in their individual 1 gallon tanks since I brought them home. I did two 50% water changes each day, meanwhile checking the parameters on my newly cycled 10g. A few times over the past few days, I've noticed them nosing around the glass beads at...