Decoration help!!

[Redtail900]

Hi folks, am new here, i came from another forum as i did not get any help when i posted. Hope someone can help here. Has anyone made their own decorations? I have got my base made complete with caves ect just need to cover it cement or clay. But unsure what to go for as this is my first time doing this. Thanks in advance

 

[nic1]

Many years ago I was reading up about making my own caves as I was unhappy with the price and scale of everything I saw in the shops.
Long story short, I didn't go ahead with it but I did read that polymer clay is good to use in the aquarium.
It's non toxic and doesn't decay.
Also once it's fired its basically like pvc.
There are some topics about this on other sites, I'm sure with an Internet search you can find them.