This is normal. This is what can happen once your krausen has fallen back into the fermenting beer. Notice the film/foam and the "floaters". The film/foam is what is left from the krausen and because of the fermentation and co2 escaping created a bit of foam. The floaters are a tan/brown color and have very smooth round edges. These are known sometimes as yeast rafts. If you see this, it is completely normal.... do not panic. If your floaters are predominantly white, have rough, jagged edges you