Hardwood Floor

[Pescador]

I used that clear plastic runner they use on carpets under my 120 and sealed the inside of the stand as much as I could with silicone.
It was flexible and it curved up at the back against the wall above the baseboard.
When I ended up moving the tank the wood was fine. I was kind of surprised cuz I'd had a few spills.
Depending on your setup you could even have a tray with a drain line in the stand.

[Oscar]

A combination of rubber mat and building the cabinet with built in "trays" for both the sump and the tank itself seem like reasonable ideas.

Other than a complete tank failure what are the common sources of water spillage?

[EmilyB]

Originally Posted by Oscar

Other than a complete tank failure what are the common sources of water spillage?

Human error. I do that one a lot....

[fortheloveofcrabs]

I have mine on hardwood - no mat. I like to live on the edge.

I can see under the tank with a flash light and the floor looks fine. I spill often, but I'm careful in cleaning up after.

[marie]

I decided to go with a cork laminate on my floor just because I am a very messy person and I am counting on cork being water resistant

[Oscar]

Originally Posted by marie

I decided to go with a cork laminate on my floor just because I am a very messy person and I am counting on cork being water resistant

Of course any wood product has been dried to a certain degree so that when you add water you get a very nice buckling effect. I guess you could view it as static waves in your living room.

[BCOrchidGuy]

I just noticed my dog seems to be peeing on the side of my tank stand during the day. On the good side, my girlfriend can't blame me for the stained carpet around the fish tank anymore... Oh and yeah I've spilled some water once or twice...

Doug