Thanks oxy, yea i looked up some of the possible hitchhikers and i don't know if its a spionid worm or spaghetti or hair worm. Shouldn't be bad though im guessing. I also realized i have some aiptasia from the live rocks. Since my tank is 14 days into cycling with ammonia and nitrite not registering and nitrate at 25ppm, is it ok to pick up some peppermint shrimps if i just did a 10% water change? I also added some cpe as well.