Best Leeb Hardness

Spa Choice 472-3-3061 Increase Calcium Spa Chemical, 1-Quart

Spa Choice Increase Calcium is used to increase calcium hardness in spas and hot tubs in areas with low levels of hardness.
Low hardness will etch plaster and corrode spa equipment.
The ideal hardness level is 200-400 ppm (parts per million).
Downloadable User Guide Available Under Product Information: Technical Specifications.

BENEFITS: Raises water hardness to maintain a level of hardness between 150-400 ppm.
USE: One ounce increases hardness 7 ppm in 500 gallons of water.
COMPATIBILITY: Compatible with chlorine, bromine, ozone, and biguanide sanitizers.
Part of Leisure Time's Simple Spa Care program.
INCLUDES: One 32-oz bottle of Leisure Time Calcium Booster.
Compatible with chlorine, bromine, ozone and biguanide sanitizers.
One ounce increases hardness 7 ppm in 500 gallons of water.

BRAND NEW PACKAGING: All Puri Tech Chemicals now come in resealable bags for easy storage!.
RAISES CALCIUM in swimming pool water.Calcium Hardness level prevents foaming, equipment and surface erosion and scaling..
DOSAGE: 2,000 Gallons: 1.5 Lbs to increase hardness 50ppm, 3 Lbs/100ppm, 6.25 Lbs/200ppm. 5,000 Gallons: 3 Lbs to increase hardness 50ppm, 6.25 Lbs/100ppm, 12.5 Lbs/200ppm. 10,000 Gallons: 6.25 Lbs to increase hardness 50ppm, 12.5 Lbs/100ppm, 25 Lbs/200ppm. 20,000 Gallons: 10.5 Lbs to increase hardness 50ppm, 25 Lbs/100ppm, 50 Lbs/200ppm..

Four double-ended picks with eight points: 2 & 3, 4 & 5, 6 & 7, 8 & 9 on Mohs' Hardness Scale.
A glass plate (hardness of about 5.5) which, when scratched, distinguishes hard from soft minerals.
A second hardness plate with a hardness value of 3.5..
A streak plate for testing a mineral streak color.

Surface : Knitted cloth (Polyester). A tracking surface that blows away all traditional conventions: Traditional mousepads have all used standard tracking surfaces. This diversely multi-use surface balances both “quickness of initial movements and light operability” with “stop ability.”.
Hardness : SOFT. The world’s best non-slip sole. Non-slip functionality on a completely different level. Water washable while maintaining functionality. This technology is on a different level than old and traditional textured non-slip features. High performance on a different level than any other company’s mousepad..
Color : Black. The world’s first and only multi-hardness feature: This single surface features 2 types of hardness – XSOFT/MID. While the surface remains consistent, the hardness in the middle layer provides a clear difference in operability. Multi-hardness, to match your tastes and preferences..
It is especially recommended for games with a lot of mouse movement. Exceptional operation feeling. Middle layer : 4mm Single foamed foam of special structure..

★ 【Main Function】The hardness of coating film is a necessary index for quality identification in coating manufacturing and coating application (coating table) industry. Pencil scratch test for film hardness is a widely used test method in the world since 1980s.
★ 【Wide Application】It is applicable to film hardness test. The instrument is mechanical, three points contact the tested surface (two points are wheels and one point is pencil core). It always ensures that the tested film forms an included angle of 45 degrees, and pushes the instrument to move horizontally with force, so as to complete the test process and determine the resistance of the film to deformation. The method is designed and manufactured according to manual operation, expresse.
★ 【Wide Application】This instrument is designed and manufactured in accordance with the manual operation method in Article 2 and 3 of the national standard "pencil test method for film hardness" GB6379-86. The instrument can be used in the laboratory, can also be applied to the construction site, and can identify the hardness of the film in any direction..
★ 【Warranty]】- If you are dissatisfied with our products, please contact us in time..

▶【High Quality Material】2.8" D2 blade, heat-treated to 60HRC hardness. 3K twill full carbon fiber handle, matte color, provides a high friction comfort touch and stylish style..

.... A tracking surface that blows away all traditional conventions: Traditional mousepads have all used standard tracking surfaces. This diversely multi-use surface balances both "quickness of initial movements and light operability" with "stop ability.".
Hardness : SOFT. The world's best non-slip sole. Non-slip functionality on a completely different level. Water washable while maintaining functionality. This technology is on a different level than old and traditional textured non-slip features. High performance on a different level than any other company's mousepad..
Color : Black. The world's first and only multi-hardness feature: This single surface features 2 types of hardness - XSOFT/MID. While the surface remains consistent, the hardness in the middle layer provides a clear difference in operability. Multi-hardness, to match your tastes and preferences..
It is especially recommended for games with a lot of mouse movement. Exceptional operation feeling. Middle layer : 4mm Single foamed foam of special structure..

.... A tracking surface that blows away all traditional conventions: Traditional mousepads have all used standard tracking surfaces. This diversely multi-use surface balances both "quickness of initial movements and light operability" with "stop ability.".
Hardness : SOFT. The world's best non-slip sole. Non-slip functionality on a completely different level. Water washable while maintaining functionality. This technology is on a different level than old and traditional textured non-slip features. High performance on a different level than any other company's mousepad..
Color : Wine Red. The world's first and only multi-hardness feature: This single surface features 2 types of hardness - XSOFT/MID. While the surface remains consistent, the hardness in the middle layer provides a clear difference in operability. Multi-hardness, to match your tastes and preferences..
It is especially recommended for games with a lot of mouse movement. Exceptional operation feeling. Middle layer : 4mm Single foamed foam of special structure..