How to clean a turtle tank effectively?

To clean a turtle tank effectively, start by removing the turtle and placing it in a separate container with some water. Drain the tank and remove any decorations or rocks. Use a scrub brush and warm water to clean the tank walls and bottom, then rinse thoroughly. Clean the filter and replace the water with dechlorinated water at the right temperature. Add back the decorations and rocks, then return the turtle to its clean tank.