Hey guys 20 gallon saltwater tank. I've got two clowns, a black clown goby(who by the way has strted eating dry food), 2 shrimp, 7 hermits and 6 snails. Water perameters where they should be. Temp at 78. Just moved houses for a short time while building our house. But to get to the point I get a lot of diatoms everyday and at water surface is a brownish film. O was looking at the aqueon hob filter. Do you think it will help to clear water on surface up and help with diatoms. Right now I have to power heads one pointed at water surface. And a slI'm skI'm protein skimmer. All animals great but the water surface is tearingmy nerves up. Going to get a couple more snails today. So any info is greatly appreciated. Thanks.