Ok so they all buy the parts from the same company and modify it and still keep the same name with different model numbers...thats freaking confusing
The CoralVue one has the Sicce pump at AquaCave.com, but the ATB one offers Purple pinwheel which will fit either CoralVue or ATB since they have the exact same pump, the Sicce PSK-2500
The CoralVue one on Aquacave.com says "Features a soft pin wheel impeller as well as a mesh wheel impeller to allow hobbyist the option of which one they prefer to use."
Not only is it the same skimmer, its the exact same picture on both sites lol