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I assume you mean keeping the pool clear of algae and bacteria.

I believe the least costly material is hypochlorite, either calcium hypochlorite (70% chlorine) or sodium hypochlorite available in...

It seems like a trick question without enough information to allow an accurate answer.

You can find the vapor pressure of materials at various temperatures from any good handbook such as Perry's...

Gas chlorine will lower the pH of water. The extent will depend upon the alkalinity of the water and the reaction with organic matter.

I suggest that you contact a commercial pool supplier or...

It is usually best to poison the ants with baits rather than using pesticide sprays, which can make the problem worse.

An effective and inexpensive ant bait is boric acid mixed with peanut butter...

I would suggest placing a bed of #2 washed stone 2 feet wide and 6 inches deep around the problem areas. I would also suggest placing commercial rat bait boxes about 50 feet apart baited with rodent...

I need a source to buy a new drive belt for a Stanley belt sander model H31A. Also a source for repair parts for same.

Thank you.