Finally he tried to control the water. He wanted it to expand and break the tank, or explode out the top. The water didn’t obey. Maybe it was enchanted, or under the power of Phorcys. Percy concentrated until his ears popped, but the best he could do was blow the lid off the plastic treasure chest.
Well, that’s it, he thought dejectedly. I’ll have to live in a plastic gingerbread house the rest of my life, fighting my giant goldfish friend and waiting for feeding time.

The Mark of Athena, Chapter XVI