JBL Nano-Floaty is an floating algae magnet for Nano aquaria with walls of plastic or glass up to 4 mm thickness. The inner section floats. Therefore no need to fish around in the aquarium if the inner part of the magnet accidentally comes apart from the outer part. JBL Nano-Floaty consists of extremely light-weight material with strong magnetic field. Dimensions: approx. 4.5 x 2.5 cm.Do you have questions about this article ?