The new JBJ rimless protein skimmer; Idel for rimless aquarium 20, 30 and 45-gallon;the compact foot print and is easy to install; effcient, durable and reliable with solid construction; provides with a skimmer that outperforms but one that also delivers daily leaving you worry -free with out micro bubbles; this sleekly designed protein skimmer is simple to set up, and easy to operate.