return above or under

[AdamsB]

I would go below the water surface. Otherwise It'll cause a lot of splashing as Aquattro said. Also If your power goes out and water drains to the sump, once the pump turns back on you'll get quite a bit more splashing till things even out again. I'm thankful for my glass lid. I had the loc line 4 inches below the water surface pointing up. Power went out, came back on 5 mins later and pounded my glass lid. That would have been a wet carpet and dry sump. Although I anticipated it, it's nice to see it in action an know if I'm not home things will be fine.

So consider what happens during water changes, power cuts etc. and remember, salt water will permanently stain drywall.

[sphelps]

For a rimless tank, through the back glass below the water level which is usually the closest to the top the builder is comfortable drilling.

[LoJack]

Yeah you gotta go underwater, above will make such a mess. You'll be cleaning up salt twice a day

Your overflow and your skimmer will do a fine job of O2 exchange and breaking up the protein film on the surface.

[kien]

Drill your return into the back wall and slap a loc-line onto it. This way you can adjust the return and play around with it by moving it above the water line and below the water line. Who knows, maybe you're the type of person who likes having salt water splash all over the place and salt creep all over your lights and the front of your glass? If you're not, then you can easily move the loc-line below the water surface :-)

[IanWR]

Originally Posted by kien

Who knows, maybe you're the type of person who likes having salt water splash all over the place and salt creep all over your lights and the front of your glass?

Is it weird that I actually laugh out loud at many posts and replies here on canreef? Kien, I have to give you a shout out as someone who consistently makes me smile while keeping me informed. Keep up the good work chum.

- Ian