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Heat your pool with a Solar Pool Heater and save the heat with a Solar Pool Cover. Solar pool heating systems are very simple in terms of engineering and application. The basic principle being: run enough water through enough black stuff on the roof and the pool gets warm.

Most pool heating systems include a:

Solar collector: The device through which pool water is circulated to be heated by the sun

Filter: Removes debris before water is pumped through the collector

Pump: Circulates water through the filter and collector and back to the pool

Flow control valve: Automatic or manual device that diverts pool water through the solar collector.

How pool heating systems work.

Pool water is pumped through the filter and then through the solar collector(s), where it is heated before it is returned to the pool. In hot climates, the collector can also be used to cool the pool during peak summer months by circulating the water through the collector at night.

Some systems include sensors and an automatic or manual valve to divert water through the collector when the collector temperature is sufficiently greater than the pool temperature. When the collector temperature is similar to the pool temperature, filtered water simply bypasses the collectors and is returned to the pool.

Solar pool collectors

Solar pool collectors are made out of different materials; the type that you buy depends on your climate and how you intend to use the collector. Collectors designed to operate only when temperatures are above freezing are inexpensive, made from specially formulated plastic materials, and generally do not include glazing (a glass covering). Collectors appropriate for colder climates, or that are designed to operate year-round, generally have metal components and a low iron-tempered glass glazing (glazing greatly increases the cost of the collector).

Solar Pool Covers

The largest heat loss from a swimming pool is from evaporation, by adding a simple barrier such as a pool cover can cut almost all of these losses. Covering the pool with a pool cover when it is not in use is the single most effective means of reducing pool heating costs. Savings of 50-70% are possible. It is also worthwhile investing in a pool cover reel, to make covering the pool easier.

Gavin Dye is Author and Webmaster at http://www.solar-power-4u.com where you can learn how to save money using solar power and wind power.

Many women experience weight gain during the premenstrual phase or the two weeks immediately before their periods. Some of this weight gain is temporary and is caused by fluid retention in the body resulting from hormonal changes. Sometimes, certain food cravings during the premenstrual phase may result in binge-eating that eventually causes weight gain. If a woman has bad period pain, headaches, or mood changes, she may be less likely to adhere to her regular exercise routine. Limited exercise, combined with increased eating, work together to increase weight. Certain antidepressant medications may also cause weight gain as a side effect.

There are several ways to reduce weight gain during the premenstrual phase. A regular exercise routine and a balanced, nutritious diet are the most important lifestyle factors. Foods high in refined sugars should be replaced with those that are high in complex carbohydrates, protein, and fiber. Food cravings can be managed by getting adequate sleep, eating smaller and more frequent meals, limiting caffeine intake, staying well hydrated, and doing at least some exercise. Reducing salt intake in the last few days before ones period can help minimize bloating and fluid retention. If fluid retention and bloating are pronounced, a diuretic such as spironolactone can be used to remove excess fluid from the body. Calcium supplements may also help reduce bloating and other PMS symptoms.

If a woman is on antidepressant medication, she can discuss with her physician the possibility of switching to a drug that does not cause weight gain. If this is not possible, weight loss strategies, such as increased exercise and a diet that restricts the total number of calories consumed, can help. Discontinuing antidepressant medication may result in worsening depression and should not be considered as a weight loss option.

PMS provides detailed information about PMS, PMS remedy, PMS symptoms, PMS treatment and more. PMS is the sister site of Ovulation And Conception.

CGI Proxy sites work by very quickly and effectively relaying web page request for users to web sites and back. The CGI Proxy script relays your information without ever revealing exactly who you are. So you are anonymous to the web site you are visiting. This is done in a near seamless manor with the user only seeing a small advertising bar on top of the page. This information is going in both directions with the web site server talking to the server hosting the CGI proxy site. The website server does not know your location (IP address), browser type, language settings, cannot set cookies on your computer and Javascripts may be restricted.

What most users do not realize is that the cgi proxy server keeps a log of all the activity including web pages visited, user names, passwords, addresses, credit card numbers or anything else a person enters in in the web pages surfed through a cgi proxy. This treasure of data is exactly what people want to hide on the internet but by using a CGI Proxy site you have just delivered the information to the CGI Proxy site owwner.

In 99% of cases the web site being visited should be more reliable and secure than a web based cgi proxy service. For example visiting yahoo mail from a new fast running CGI Proxy site, yahoo is less likely to criminally use provided information collected from its websites combined with the knowledge of your location and browser type than a small website operator hosting a free CGI Proxy script. While logging into your yahoo account and not revealing your location (IP) to yahoo may sound positive, the price you pay is sharing all of your information including passwords with the CGI proxy site owner.

credit card information, addresses, contacts or any other information entered on a web form while surfing pages through a CGI Proxy site are also available in the server logs. Don't take the unneeded risk with your personal information, DO not USE WEBBASED CGI PROXY SITES FOR ANONYMITY.

CGI Proxy sites do have evolved into a leading way to bypass network website filters that block specific sites. just be sure that you know the risk involved in checking your hotmail from work or looking at your myspace profile at school. This is a leading source of hijacked profiles for these sites.

Michael Paul is a web site developer who shares his insight into the working s of the web. Learn more about start using cgi proxy at http://www.cgiproxy.info