Ok havnt had a tank in 3 yrs building my house. Some might remember i had a 250 reef for years. But for now i plan to start back with my 90 . My tank isnt drilled so what overflow is good these days? I have an eshopps and its too loud. I know ghost overflow is awesome but everyone is out of stock or 6 weeks to build one. So i have had a cpr which is where i am leaning now.