In one sentence, describe what the following article is about: Polo requires a particular uniform, which helps to protect players. There are also safety requirements for the ponies. Helmets are a must for safety. They offer protection in various scenarios, including falling off the pony and getting hit with a mallet or ball. The outfit includes a long-sleeved jersey with riding pants and boots. In many cases, players are not allowed to wear sharp spurs or gear with protruding buckles or studs. Ponies must wear boots on all four hooves and bandages on all four legs for protection from the ball. Players are not allowed to use a bridle with blinkers on their ponies. Blinkers obstruct the view of the pony. The rules are meant to keep play safe for both players and ponies, and there are some key rules to highlight. Players may not touch another player or pony, including tack (e.g. saddle, blanket, et cetera), with his/her mallet. Polo must be played right-handed because left-handed players are thought to have less accuracy. It is important that polo ponies are well-trained and easily controlled. If a pony misbehaves and gets out of its rider's control, it is a danger not only to its rider but also to other players and officials. Swing the mallet at an appropriate distance from other players or officials. Swinging it in close range could cause a foul. For obvious reasons, this inhibits a player's judgment and puts himself/herself at risk, as well as the other players and officials. This includes a variety of issues, and it mainly refers to incidents that happened before or during play. Broken or fractured bones Dislocated joint sockets Concussions Illness, such as a virus, infection, or influenza Many players learn how to ride while learning how to play polo, but it is best to have a basic understanding of how to ride. Take riding lessons with a polo club or at a stable that offers lessons. Understand how polo ponies are trained, which is to be reined with one hand and to be highly responsive to leg cues. Become familiar with all ponies that you will ride during polo matches. Each pony has its own temperament. Dangerous riding is worthy of a foul and could cause disqualification from the match, in addition to putting other players and officials at risk. Riding an opponent's pony into the side or end walls Riding the head of a pony into an opposing player Interfering in the right of way of another player with the potential to cause a collision Bumping off, or riding off, at an unsafe angle or speed Riding into the hindquarters of another pony Zigzagging in front of another player
Summary: Wear the appropriate gear for play. Follow the rules of the game. Avoid participating in any recreational drug or alcohol use prior to play. Stop or do not participate in play if a player is physically impaired. Learn how to ride a horse prior to play. Ride your pony safely and carefully.

Problem: Article: When you own a hot tub, it's important to maintain proper levels of pH to reduce eye and skin irritants caused by the disinfectants in the water. pH is a scale that tells you how alkaline or acidic a substance is. Pure water has a pH of 7, and a spa or hot tub should be between 7.2 and 7.8. If your water's pH is too high or too low, purchase pH increaser or decreaser at your local home improvement store to change the levels accordingly. You can use hot tub test strips to test the pH of the water. To use a strip, submerge it in the water for about 15 seconds. The strip will change color according to your water's pH, and you can match that color to the label to identify it. If your calcium levels are too high, you'll notice cloudy water and scaling on the sides of the tub. On the other hand, if the calcium levels are too low, the water can cause erosion and damage to the tub. You can use water hardness test strips to check the calcium levels, then take action to make the necessary adjustments. It is recommended that calcium levels remain between 175 and 275 ppm (parts per million). But keep in mind that the ideal calcium hardness depends on the type of hot tub you own. Make sure to check with your hot tub's manufacturer for this information. Add calcium booster if calcium levels are low. If calcium levels are too high, drain water from the hot tub and add low calcium water to balance it out. You can choose either bromine or chlorine to keep your hot tub clean. Both of these chemicals come in either powder or tablet form. Bromine levels should stay between 3-5ppm, depending on whether you use tablets or powder. Chlorine levels should always stay between 2 and 5 ppm. Check the levels of these chemicals using test strips, and then make adjustments accordingly. Bromine and chlorine in tablets are added to a dispenser that floats around the pool and gradually dissolves in the water. These chemicals in powder form are measured and poured directly into the water. Whether you use chlorine or bromine is up to you. Some people prefer bromine because it doesn't have that chlorine bleach smell. However, it will break down from sun exposure, so it should only be used in spas that are not in direct sunlight. Some advantages to chlorine are that it is cost-effective, easy to manage in the water, and it's very aggressive when killing bacteria. It is important to keep your hot tub clean to remove any impurities and buildup. To give it a proper cleaning, you'll first need to completely drain the hot tub. Then, using the manufacturer's recommended hot tub cleaner, wipe down the entire surface. Make sure to clean the filters thoroughly by spraying them with water and soaking them in an oil-cutting solution. Clean your hot tub cover when you clean the rest of the hot tub because it is constantly exposed to dirt and other germs. When you have a group of people using a hot tub, users will be constantly getting in and out and walking around. Make sure the areas around your hot tub are clear of debris. If there is a lot of dirt and grime near the hot tub, someone may step in it and get it into the tub, dirtying up the water. Keep a broom nearby to sweep any dirt, leaves, or other loose items from around your hot tub. The maximum temperature in a hot tub depends on a few different factors. The ideal hot tub temperature for adults is 100F (38C). For children at least 10 years of age, the temperature should not be above 98F (37C). As a general rule, a hot tub should never be hotter than 104F (40C). Most hot tubs have thermostats that read the water temperature, but they may be inaccurate by as much as 4 degrees. It's better to check the water temperature using a thermometer. Pregnant woman should not be in a hot tub over 102F (39C), and should only stay in for 10 minutes at a time. Regular hot tub maintenance is important for both safety and to keep in good working condition. You should have your spa checked by a professional quarterly. They have access to advanced testing equipment and can perform tune-ups to evaluate any hardware or wiring issues. Keep in mind that if you're about to enter a hot tub, you should be able to listen and hear the pumps and filtration systems running. This is a good sign that the hot tub is working effectively. Keeping the cover on will save energy and prevent animals and young children from falling in. Plus, it will keep dirt and debris out. Consider using a locking cover to prevent children and unwanted guests from using it when you are not around. Also, remember to clean the hot tub cover regularly when you clean the rest of the hot tub.
Summary:
Maintain a pH between 7.2 and 7.8 with pH increaser or decreaser. Test your calcium levels to protect the water from impurities. Add chlorine or bromine to sanitize the water and prevent the spread of germs. Clean your hot tub monthly. Keep surfaces around the hot tub clean. Maintain an appropriate temperature during use. Check the hot tub water and equipment regularly. Always keep the hot tub locked and covered when you're not using it.