Our hardness increaser is convenient and easy to use. It will quickly increase the calcium hardness in your pool, hot tub or spa water. Low hardness can corrode your pool, hot tub or spa plumbing and heaters as well as staining or etching the surface.
Water hardness should be kept between 100- 250 ppm for acrylic finish, and 250-450 ppm for plaster finish
Swimming Pools To increase hardness of a 10,000l pool by 50ppm add 750g of Hardness Increaser
Spa and Hot Tub To Increase hardness of a 1000l spa by 50ppm add 75g Hardness Increaser
These 30-piece children pencils are made of wood and graphite. Size: 18.5 x 7 cm; Eraser width: approx. 2.6 cm. * The erasers are movable.
These pencils are made with bright red yellow etc. colors, their erasers are in many sweet shapes, like flower, frog, cat, butterfly, bear, cloud etc. These cute designs can definitely attract children as well adults. (Note: The shapes, patterns and colors are random)
These pencils with eraser are in good quality, hardness grade HB, they are very practical for writing and erasing mistakes, are perfect for teaching, school, office or home use.
The pencil with eraser set is a perfect choice as presents for party favours, giveaway gifts, kids birthday party, party bag fillers, baby shower, christening, Christmas Day, garden party, school rewards.
They can also be used as gifts for your friends, colleagues, etc. They will make your life more colorful.
Ultra Clarity: 99.99% HD clarity and touch screen accuracy, oleophobic screen coating magically resists oils and reduces annoying fingerprints, against dirt and dust. High touch sensitity gives a natural feel and fast response.
Precision Engineering: Precise laser cut tempered glass made with polished, rounded edges. 2.5D Round edge provides more comfortable handle feeling than the right angle edge.
Spotless Display: One-push super easily installation, automatically attach to the screen smoothly, hassle-free and bubble-free. No residue when removed, can repeatable installation.
Top Grade Protection: Explosion-proof 9H hardness scratch-resistant screen protector can effectively protect your phone from unwanted dropping, scuffs and scratches by keys, knife, etc..
3D Touch Compatible: The smooth glass gives the same feeling and responsiveness of the original touch screen, also preserves the 3D function. Specifically designed for Samsung Galaxy S8.