A Gravel vacuum is an important Instrument for maintaining a clean tank. Eventually, particles accumulates during the gravel, influencing drinking water high quality. A gravel vacuum, such as Lee's Gravel Vacuum with Hose, facilitates economical cleaning with out disturbing your fish and decorations. 优点是该软件能保存原始数据的所有属性不会丢失，缺点是没有注册的话，不能进行批量处理，... https://pearlaquatics.my/product-category/aquarium-submersible-pump/