I just bought a cpr bak pak skimmer a week ago but was collecting a slick on the surface that was loaded with micro bubbles. Instead of buying a pre-skimmer i just got a little rio200 powerhead and attached a spray bar which disrupts the surface . I know this helps with oxygenation and reduces surface tension but are there any other added benifits? Im curious, would this disruption increase or decrease temperature exchange from my lights?