first of all 2 weeks is way to short to be putting a fish in any tank unless you used something like Dr. Tims One and Only and followed its instructions to a T. Furthermore depending on your variety of angler, 30 gallons may to be small long run. Now to answer your question, all skimmers are different and i do not have experience with your but you should have valves that let you adjust the amount of air and water entering the reaction chamber, if so adjust these valves until you have the desired reaction(try less water flow.) also they can sometimes need to settle in before they will stop spewing bubbles out, and in some cases the skimmer may just be poorly designed and release bubbles no matter what. Most of us run skimmers in sumps under our tanks and have baffling that not only controls water level but also forces bubbles to rise to the top of the water and be released.
