I've got a ball valve on my pump but if u slow it down then the overflow out does the pump and it don't fill the tank up as fast. Will mesh not rust? I have to figure out something I have lost countless neons and danios and all of my guppies
The stainless steel mesh won't.(Well it might a little after some time but not for awhile) Check item #190884708484 on [Ebay Link Removed] Just bend it over the overflow box. You will have to keep the plant debris cleaned off of it so it doesn't restrict flow.