Sandstone DYI decor?

[lightupthedarkness30]

I'm trying to setup a DIY cheap build and I have a lot of sandstone that I could make into some awesome formations. Is sandstone safe to use? And what kind of silicon would I need to use to glue together?

 

[meegosh]

It will raise your pH some but it may desirable depending on the fish you plan on keeping. I have a bunch in my geo tank and they've been great for months.

 

[butterfly_koi]

I'm trying to setup a DIY cheap build and I have a lot of sandstone that I could make into some awesome formations. Is sandstone safe to use? And what kind of silicon would I need to use to glue together?

The silicone should be 100% silicone.
GE silicone 1 (windows and doors) check and make sure that it doesn't have any extra added chemicals our it can kill your fish. Meegosh is right it can raise the Ph in your tank

 

[lightupthedarkness30]

It will raise your pH some but it may desirable depending on the fish you plan on keeping. I have a bunch in my geo tank and they've been great for months.

I'm not sure on what I'm putting in there yet but I just wanted to know if it was a possibility. Would it be a good idea to test them in water by putting them in and testing the ph before and after?

 

[meegosh]

It can't hurt to test it that way. At least you'll know what type of pH you'll be dealing with. I've got quite a bit in my 75g and it only raised my pH .5 so don't expect a big swing in pH.