Anyone made their own aquarium decorations?

Setting up a new aquarium is always exciting, but finding the right decorations can be a bit challenging. Lately, I’ve been thinking about creating my own decorations instead of just buying them. I want something that matches my tank’s theme and lets me get a bit creative. Plus, I’ve heard DIY options can be more affordable and better suited for my fish.

Has anyone here tried this? What materials did you use, and how did you make sure they were safe for your aquarium? I’d love to hear any tips you have or stories about what worked well or didn’t. How do you balance aesthetics with functionality when decorating an aquarium?