I don't know anything about rimless tanks but both of my tanks are open top and even with 2 cats and 5 dogs I don't have any problems with hair or dust. Neither cat is of a really hairy type and the dogs are all small but I also have tile floors and a ceiling fan above and in front of the tanks. I do get more evaporation but it doesn't cause a temperature issue so it's only a little more RO for topping off. I do have egg crate on the larger tank, mainly because of the eel and wrasse and it does diffuse the lighting some. I'd like to get in on some of that netting if if I could find some.