The magnitude of an earthquake, usually expressed by the Richter Scale, is a measure of the amplitude of the seismic waves. The moment magnitude of an earthquake is a measure of the amount of energy released-an amount that can be estimated from seismograph readings.
Remove rust stains from virtually all surfaces you'll find in your bathroom. Restore porcelain bathtubs and sinks to their original condition, plus keep your toilet rust-free by using Iron Out Automatic Toilet Bowl Cleaner. Toilet Bowl and Water Tank Rust Stains â Use 1/2 cup (125 ml).
Step 3 - Cleaning Calcium Stains. The first method of calcium stain removal requires the use of a pumice stone, preferably a pumice stone equipped with a plastic handle. Vigorously rub your pumice stone over the stains until they have been removed. If the stains have had a lot of time to set in, they may prove stubborn. With the right amount of strength and patience, you should eventually be able to expel them from your toilet bowl. If you don't have access to a pumice stone, you can get rid of calcium stains with the help of a commercial stainless steel cleaner.