ISTA Water Surface Skimmer Effectively remove organism and protein floats for a clear water surface. Increase photosynthesis, oxygen exchange and light penetration. Patented self-floating inlet will automatically adjust itself according to water level. Suitable with hang-on filters and external filters. Instructions Needed to be connected with external filter or submersible filter to promptly filtrate the organism on the water surface. To adjust the surface water flow rate, simply rotate the pole for adjustment.
