You don't need to buy chlorine, pH increasers or pool cleaning solvents to keep your pool in tip-top shape. These chemicals are expensive, unnecessary and easily replaced with common household chemicals like bleach, sodium bicarbonate, commonly known as baking soda, and vinegar. Even if you don't have these products in your home, they are much cheaper than and just as effective as regular pool chemicals. Always test your pool water with a test kit, which is available at pool supply stores, before altering the pool chemistry with any chemicals.
Increase the chlorine content of your pool with common household bleach. The chlorine content should be between 1 and 3 parts per million. Dilute the bleach with water from the pool, using about 4 gallons of water for every 1 gallon of bleach. Pour the solution into two different places in the shallow end and two places in the deep end. Doing this raises the chlorine content of 10,000 gallons of water by about 1 ppm.
Augment the pH level with sodium bicarbonate. The pH level should be between 7.5 and 7.8. Use a scale to measure out about 1 lb. of sodium bicarbonate for every 10,000 gallons of water. Scatter the sodium bicarbonate all over the pool water. This raises the pH level by about 0.1.
Remove stains from your pool with white vinegar or apple cider vinegar. Drain some of the water from the pool so that the waterline is below the stains. Soak a rough rag with vinegar and wipe the stains with the vinegar. Leave a thin coating of vinegar on the stains for five minutes. Use a pumice stone to scour the stains away. Rinse the rag with water and wipe down the area to remove the vinegar before refilling the pool.