Giant Aquatic spiders inside my turtle tank

Date: 8/8/2017

So in real life I have two red eared slider turtles about 10 years old. In the dream they weren't in their tank and it was super dirty. Thick clouds of algae and dirt everywhere. Then under the water from behind a rock crawled the biggest most terrifying spider in the world. It was about 6 inches across and looked like a tarantula except it had really long hairless legs. Then there was another one. And my turtles were in another smaller empty tank beside the big one. Which means somebody must have taken them out and spiders got into my normal one. Euuuuuuuuuuwwwwuwu Horrible