With the appropriate DOOA cover, your Wabi-Kusa is protected from excess evaporation. It also keeps away dust and other impurities from your aquarium and its inhabitants. In addition, it acts as thermal insulation and thus saves electricity. Noticeably less water evaporates and the air humidity in the tank is kept at an ideal level especially for Wabi-Kusa. The fixing of the cover is very easy with the help of the antiskid sticker that come with the cover.