Fish don’t like an acidic tank. You can add a pinch of bicarbonate of soda to make it less acidic. Bicarb is also good for cleaning the tank as it is safe and leaves no taint. Rinse the tank out carefully before refilling.
Suitcases and other luggage can get stored for months at a time and can get a musty smell, especially when left in the loft or attic. When you get your luggage down for a trip, sprinkle a little bicarbonate of soda inside the day before you pack, leave overnight and vacuum in the morning.
Bring copper, brass, or bronze up like new by mixing three parts bicarbonate of soda and one part lemon juice or white vinegar and cleaning with a soft cloth. But remember that if you’re polishing brass, you must make sure it is uncoated or it won’t work.
To clean marks such as those from crayon, pencil, marker pens or grease, off washable walls, make a solution of bicarbonate of soda and warm water and wipe over. If any marks prove hard to shift, sprinkle dry bicarb on a damp cloth or sponge and scour gently. (It is a good idea to test out an inconspicuous area of wall first, just in case it isn’t as washable as you thought!)
If you are going to vacuum the carpet, it will be much fresher afterwards if you sprinkle it with bicarbonate of soda first. Leave it for about 10-15 minutes, or overnight if possible, then vacuum the carpet until all traces of powder have disappeared.