Hey whats up fellow fish heads. I havent been over in the d.i.y sectoin for awhile so excuse me if this has allready been covered. But here is a link to some one making a d.i.y styro type back ground using some kind of quick right concrete to coat it with. And then nothing on top of that. Is that actually fish tank safe? This guys shows and says that it rases the p.h and he fills and drains in 8 times to make it normal. I am a little skeptical that concrete is fish tank safe. Maybe im mistaken but have allways thought u couldnt put concrete blocks in a fish tank. This would make a solid way to do it if it actually is inert or fish tank safe. Please chime in and give me your thoughts guys. I know there is a ton of you that know the answer. Thanks for your time. Allso seems like it would make it super heavy how much wait can say a standard 75's bottom hold. I have never put tons of big rocks in a tank. But i guess salt reefs have tons of life rock so that probually wouldnt be a issue. Any thoughts, thanks
http://www.youtube.com/watch?v=_5Ng6GeF9mA
http://www.youtube.com/watch?v=_5Ng6GeF9mA