New Grower Black Eggs Help

This is my first grow and im about 3 weeks into it. Its hydroponic and im using rockwool as the medium. I went to change the water for the first time and to start adding nutes when i noticed a couple like squishy tad pole like things in my water with beady black eyes. I got those out quickly and put in my nutes and everything but just when i was leaving i noticed a black dot in my rockwool. I went and investigated and notice quite a bit of these black dots. there would be a couple clusters of them and then some just randomly loner. My question is, is this bad lol? Ill take an advice cuz i have no idea how to deal with this.
thanks
Productive Pothead

I don't know but I wouldn't take any chances, you might have to clean the hole setup

im no ydro man but ii will tell u right now that thos lil black things are mold spreading....look in2 it but ii think people use tad bits(lol tad bit) of hydro. perox. in the res..but dont take my word for it cuz ii am quantom gurilla growing on meteors on neptunes ring,,under plutos moon zantor's light

spell check=hydro,hydrogen peroxide....GO!!!!!!!!!!!1

clean every thing to make sure its good to go again