Hi all this is more of just a Heads Up, I bought a Hydor koralia smart wavemaker for use with Hydor Koralia Evolution pumps. After installing this and attaching these Two Hydor Koralia Evolution pumps to it, After only about a week and a half running on these One of the Hydor Koralia Evolution pumps Exploded. That's right the front of the Cage that Holds the Rubber anti-Back Spin plug busted out and fell to the bottom of my Aquarium. Apparently as the Hydor koralia smart wavemaker doesn't have ramp up or down capability every time it flips on the Impellor Hammers that back spin plug after a few times of this flipping on it broke the flimsy cage that holds it. So you may want to think twice before getting one of these, Also after reading reviews others have had the same problem, I should have read the reviews first, If you attempt to use other pumps with these they make a Loud Crack everything they come on loud enough to scare the peonies out of your Aquarium inhabitance. ADDENDUM It looks like I have the Opportunity to help in another way in here, BROKEN PLASTICS THAT NEED MENDING FOR YOUR AQAURIUM, and safe for your inhabitance. I mended my koralia using the following and at the moment its back in service. As I used to work as a Chemist along time ago, before doing so gave me cancer, I found that if you take Super Glue Gel put it on your Plastic Item that requires repair, And then sprinkle Arm and Hammer baking soda on to the Glue then carefully Poke the glue and baking soda into one another, this Alkalinity change actually changes the Molecular structure of this Mending solution or ethyl-2- cyanoacrylate) or (methyl-2-cyanoacrylate) into a High Tensile plastic oddly stronger then the Original plastic, just remember to clean and rough up the adjacent surfaces, Also if your careful you can use it to put Coral frags onto plugs this chemical reaction that transpires between the glue and the Arm and Hammer causes this substance to all most instantly Volcanize or harden so keep this in mind when fixing your plastics or coral fragging I hope this info is helpful to others. Let me know what you think?