Lids on a FOWLR?

[Animal-Chin]

a lot of people do it cause it looks cool. I had a rimless tank that looked just awesome open but I'd get calls at work "DAD your fish is flopping on the floor what do I do" or I'd wake up and a clownfish would be crusty on the living room table.

Its just a risk. Some people never have issues, I guess it would depend on your stock. If you have a couple of peaceful fish, you may never have a jumper, I happen to keep a super aggressing sailfin tang and have some really expensive wrasses, it would kill me to loose them due to jumping so this tank I have now has a full mesh lid.

They sell some pretty cook kits now that make it so you can add corners and cut outs, that sort of thing. Worth a look.