Gunite pools have a rough and porous surface, which algae can grow on and stain. If you have a gunite pool, take proper care of it by maintaining the water circulation, filtration, water chemistry and chlorine. \'Shock\' the pool as needed. Shocking the pool means putting in oxidizing chemicals to rid the water of bather waste. If algae has already grown and taken over, use an algaecide and pool shock to kill the algae. There are some steps you can take to kill the algae in your pool and on your pool equipment.\nThoroughly brush the pool using a wire-bristle brush. Place all items that have come in contact with the contaminated water, including the brush, in the shallow end of the pool. This will kill any algae off the items so they do not re-contaminate the water after it has been cleaned.\nAdd an appropriate amount of algaecide to the water, according to the manufacturer\'s instructions.\nShock the pool at least five hours after adding the algaecide. Use 2 lbs. of shock per 10,000 gallons of water.\nWait until the next day. Remove the pool brush
from the shallow water and thoroughly brush the pool in the morning and evening.\nFill the pool to its highest point the next morning. According to the Pool Manual website, this allows you to bypass the filter and vacuum the algae to a waste line. You do this because algae can live on the inside walls of the filter, which could allow it to get picked up by water during circulation and re-enter and re-infest the pool.\nRemove the pool vacuum from the shallow water. Vacuum everything out to the waste line. Put all vacuum items back in the shallow end of the pool and fill the pool to the standard operating water level (half way up the skimmer) with a garden hose.\nBrush the entire pool that evening and again, at least once a day, for the next two days.\nRemove everything from the shallow end of the pool, assuming the algae appear to be gone. Brush the entire pool and, if a metallic algaecide was used, add a metal sequestering agent to the water to rid it of any lingering copper.\nBrush the entire pool the next day (Day 7).\nWait another day (Day 8) and add 1 lb. of shock per 10,000 gallons of water.
Chlorine (liquid chlorine or sodium hypochlorite - as used for swimming pools) or regular household bleech (a less concentrated version of liquid chlorine for swimming pools), is the best way of cleaning any stone surface.Simple make a solution of liquid chlorine (or bleech) in a bucket of water then pour this over the surface to be cleaned. Then scrub it into the surface with a yard brush or pool brush.
Then leave it to soak in.
Do not add any more water, and do not even think about using a jet washer.The solution will be absorbed into the stone and kill all the algae, microbs etc growing in the stone. The surface will remain clean for a long time.
Pool crowns often will not need any more cleaning for two years or so.Do this job after the sun has left the area to be cleaned. Then over night the chlorine can do its work without sun absorbtion.
That is it.
The easiest cheapest and most effective method of cleaning all stone surfaces
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