Problem: Write an article based on this summary: Wash your hair. Let your hair air dry. Determine your hair’s curl pattern. Find your hair subcategory. Compare your hair to the LOIS system.

Answer: Using your regular shampoo and conditioner regimen, wash your hair as you normally would. Rinse your hair clean of shampoo and conditioner. Using a hair dryer might change the way your hair reacts in a certain amount of time, so using a towel and air to dry your hair is the best method. Andre Walker, hairstylist for Oprah Winfrey, created a system for determining hair type primarily based on curl size and pattern. This includes a range of hair types from straight to coily.   1 (straight): Hair has no curve in it at all.  2 (wavy): Hair is wavy but does not curl much.  3 (curly): Hair is curly with an S shape and holds a definite curl pattern even when unstyled.  4 (coily): Hair is tightly coiled or kinky, often with a definite Z pattern. It can be stretched out and will return to its curled shape when released. Type 4 hair might shrink up to 75% of its actual length. Take a look at a representative chunk of your hair. Observe the thickness and pattern of the curl (if you have curls). ,  These are also based on the Andre Walker system that categorizes hair into four types and three subcategories per type.   1A: Hair is soft and cannot hold a curl.  1B: Hair does not curl but has more volume.  1C: Hair does not curl and is rather coarse.  2A: Hair is wavy, resembling the letter S, and is coarse.  2B: Hair is often frizzy with a definite wave.  2C:  Hair is very frizzy with thick waves, and is the coarsest of this category.  3A: Curls are about the same diameter as sidewalk chalk, or pretty loose curls.  3B: Curls are about the same diameter as a sharpie, or medium-sized curls.  3C: Curls are about the same diameter as a pencil, or corkscrew curls.  4A: Curls are very tight, about the same diameter as a needle.  4B: Curls resemble a zigzag pattern, looking like the letter Z.  4C: There might not be a curl pattern to this hair type. It has a tight zigzag with an uneven pattern, so it is harder to define. The LOIS system is a curl typing system that considers strand texture and thickness as well. It compares a strand of your hair to the letters L (Bend), O (Curl), I (Straight) and S (Wave). Take a single strand and hold it up with one hand. Compare your hair to the shapes of the letters L, O, I and S.   L: Your strand looks like the letter L, with right angles, bends and folds. This is kinky, zigzag pattern hair.  O: Your strand resembles the letter O or spirals into several Os.  I: Your strand is straight with little to no curves or waves, resembling the letter I.  S: Your strand is wavy and curves back and forth like the letter S.  Combination: Your strand might have a combination of two or more of these letters. If this is the case, check a few more strands of hair from all over your head to see if one of the letters is more dominant.


Problem: Write an article based on this summary: Purchase a CO2 system for safer pH control. Have a professional install your system. Avoid using a CO2 system if your water is hard or high in total alkalinity.

Answer:
Carbon dioxide, or CO2, can safely and effectively lower and stabilize your pool’s pH. A variety of CO2 systems for pools are available, some of which can automatically analyze your pool’s pH and adjust their output accordingly. These devices are available through specialty pool and spa supply stores.  Some CO2 systems are fully automated, while others have to be controlled manually. Consult a specialist at a pool supply store to determine what type of CO2 system is best for your pool. These systems can be expensive, ranging in price from $300-$10,000 USD. However, a CO2 system may ultimately save you money, since it minimizes the need for frequent pH and chlorine adjustments. Unless you have a lot of experience installing pool equipment, it is probably best to have a pool technician install the CO2 system for you. Consider consulting a professional before you purchase a CO2 system, so that they can help you determine whether the system is a good fit for your pool. Since CO2 can raise your pool’s total alkalinity, it is best not to use a CO2 system if your water already has a high total alkalinity (i.e., if water tests reveal it is over 125 ppm). CO2 is also less effective at lowering pH if your water is hard. Consult a pool technician to determine if your water conditions are right for a CO2 system.