Gluing rocks together

ndz98 · Aug 27, 2017

I'm about to start the scaping process for my 75 g tank and I want to make sure that the rocks are stable, and will stay that way for a long time. I know they make epoxy putty and like a super glue gel like the one below. Is there any other type of glue you guys have used that have worked well? Is there another type of super glue that will work equally as well but maybe cheaper than the one on brs? Thanks guys!

Idoc · Aug 27, 2017

Many recommended hydraulic cement from Lowe's and home depot... costs around $10 for a lot of it. Many said its basically the same thing as the marco e400 cement they sell for about $35 for a very small quantity. I recently used it to "tack" some rocks to each other... in case I wanted to move them later. It worked very well. But, it hardens up very fast, so you only want to mix a small amount for each "weld" you want to make! It literally goes from runny to difficult to mold/spread in a couple of minutes... gotta keep adding water as you go.