So back in the day of .my rescuing my Mozambique tilapia from winter, I plopped them in my 55 and sold them off in spring, apparently I brought in some little artemesia shrimp looking things with them,

Maybe a quarter inch long, tan or clear, I don't think I can get a good picture. I have a cycled tank with quite a few, before I stock it should I try to evict them? Or are they, as I suspect, free fish food?