Two weeks ago I discover little dots in my tank moving around in the gravel. I paid no mind to them until they started to multiply. I did my research and found that they are Ostracods. There all over my glass, mainly on little areas of algae. I tried to clean as much algae as I could. I even siphoned a bunch of them every water change but they just keep coming. So I got frustrated and drop the chemical bomb. I overdosed with Excel and it worked like a charm. None of my plants got harmed in the process and everything seems to be back to normal. I was sadly mistaken and now there back and im seeking for some help in getting rid of them. I don’t have any fish in the tank but wondering if there's a fish that would do the job.