<human>:  How to properly clean a fish tank?
<bot>: 
1. Begin by unplugging the tank and power filter before removing the water with a siphon and bucket.
2. Scrape away any algae and other debris on the sides of the tank with an aquarium-safe scraper or sponge.
3. Deep clean the rocks, decorations, and gravel with hot water, but be sure to avoid any detergents or soap, as they can hurt the fish and other inhabitants of the tank.
4. Once everything has been scrubbed, place decorations, rocks, and gravel back into the tank.
5. Refill the tank with dechlorinated or aged water, or a chlorine neutralizing solution to make sure that the water is clean and safe for the fish.
6. Plug in the filter and other equipment, and turn it on so that oxygen is pushed back into the tank.
7. Allow the water to settle for a day or two before adding the fish back into their habitat.