JBL Proclean Aqua Ex 20-45Sophisticated and highly effective gravel cleaner to siphon off waste in aquariums from 20 cm height upwards Use: shake the gravel cleaner, let water flow into the bucket, siphon the waste out of the substrate, close the stopcock when finished A corner on the round gravel cleaner ensures an efficient and powerful whirl effect so you can move and easily siphon off dirt from the aquarium corners The protective sieve can be removed for cleaning and