I love the closed loop I put on the new tank.I say yes but on an acrylic tank your restricted to where you can put it.If you put holes on the ends you reduce the strength by 50% and if you do the back wall it will bow and experience a reduction of 35% these percentages are from tentacore and not my back side.So you have basicaly only the bottom that you can safely drill.Don't get me wrong lots of people do drill the ends and back but those are huge drops in the safety factor.So if you plan the rock scape to you CL,go for it!! You wont regret it.My next tank will be designed for multiple closed loops to avoid the need for PH.If you add flow inducters to the CL you will have more flow then you know what to do with.
Oh Ouch didnt know that hmmm well thats why I started the other thread about the ups and downs of doing this. Glad you posted thank you.
"The beatings will continue until morale improves."