How can i clean my plastic fish tank without using an ammonia based glass cleaner?
Inside or outside surfaces of the tank? Outside, you can use plain water with a drop or 2 of dish soap. Inside, you must never ever use soap or chemicals (you could kill your fish). Use plain water, distilled white vinegar diluted with water, or, if the tank's inside surfaces are slimy and gunky you CAN scrub (gently!) with baking soda or salt. Don't rub hard though, or the plastic will scratch. If you use anything other than plain water, you must rinse, rinse, rinse ... and then rinse again.
