I bought a 'sunken ship' ornament with real fabric sails and twine rigging to go in my tank about a month ago. I thought it would look really neat with the fabric moving with the water currents. However, I took a closer look at the sails this morning and they were covered with mold and mildew. I immediately took the ship out and cut the sails and rigging away (the rest of the ship is plastic.) I guess not all aquarium ornaments are aquarium safe!
Take a close look at the spread-out sail on the bottom and you can see green and blue in the lower corner. Yuck.

Take a close look at the spread-out sail on the bottom and you can see green and blue in the lower corner. Yuck.
