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Puri-Cal NSF Grade Calcite 0.55 cubic foot
ATTENTION: Avoiding Media Coming Back Out of Drain Line
Questions? Get a Fast Answer to your water treatment problems, click here!
PURI-CAL brand calcite is a premium grade pure NSF-Certified calcite produced in the North Cascades Mountains of Washington State. 400 million years ago, the calcite skeletons of tiny sea creatures called coccoliths collected on the ocean floors.
Over time, continual collisions and folding of the earth's crust, generating extreme pressure and temperature transformed these skeletal deposits into the high grade, pure white marble from which Puri-Cal is made. It is specially selected and sized to optimally adjust pH in potable water systems. When used in accordance with standard water treatment practices it will gently and effectively adjust the pH of your water and help minimize corrosion problems in plumbing and appliances.
- Proper use of PURI-CAL can help water systems comply with the EPA lead and copper rule.
- When used in back-washing filter systems PURI-CAL can significantly clarify cloudy and turbid water.
- PURI-CAL Independently tested and certified by NSF to Standard 60.
- Sold in 1/2 cubic foot (45 lb) bags.
- Mesh size is 16 x 40.
Note - our standard non-NSF calcite is a very clean and excellent quality calcite. Puri-Cal is NSF certified for potable water and costs more, and is used where NSF certification is required, or customers want a premimum grade. Both work well to correct low pH.
|Free Illustrated Report with order: "How to Add Calcite and/or Corosex to Neutralizer Tank Down Flow and Up Flow Systems"|
|Which calcite or blend to select:||Use to raise pH:|
|Calcite||Use if your pH is from 6.0 to 6.9
Raises pH to 7.0 to 7.5.
|Calcite-Corosex 90%/10% Blend||Use if your pH is from 5.0 to 6.0
Raises pH to 7.0 to 7.5
|Calcite-Corosex 80%/20% Blend||Use if your pH is from 4.5 to 5.0
Raises pH to 7.0 to 7.5
|Corosex||Useful for pH from 4.0 to 6.0
Raises pH to 7.0 to 8.5
Note: usually blended with Calcite
|Common Tank Sizes||Amount of calcite media in tank:|
|9' diameter x 48" height||1.0 cubic foot - 100 lbs|
|10" diameter x 44" height||1.0 cubic foot - 100 lbs|
|10" diameter x 54" height||1.5 cubic foot - 150 lbs|
|12" diameter x 52" height||2.0 cubic foot - 200 lbs|
|13" diameter x 54" height||2.5 cubic foot - 250 lbs|
|CLICK HERE to see our CALCITE CARTRIDGES .
Cartridge sizes available to fit standard 10" filter housings in addition to whole house 'big blue' style filter housings. These are appropriate for point-of-use applications, such as at one faucet, but are not used for correcting the pH for the entire home as the amount of calcite is not sufficient.
Need a new calcite acid pH neutralizer? Click here to see our advanced neutralizers.
|Frequently Asked Questions:
Q. Should I use plain calcite or a blend of calcite and corosex?
A. Generally plain calcite works in most applications (which are in the range of 6.0 to 6.9 pH). if in doubt of your acidic water pH, start with plain calcite. However if you know your pH is less than 6.0, in the range of 5.0 to 6.0, then use a blend of 90% calcite and corosex. This will work in 90% of the applications. In some rare cases if the water is very cold, or if the flow rate is high (a lot of water being used daily) it is OK to use the 80% calcite and 20% corosex.
Q. What is the problem with using a lot more Corosex?
A.Too much Corosex can over-correct the pH and raise the pH up above 8.5. Generally most corrosive water applications (such as for correcting acidic well water for homes with copper pipe etc) work best if the pH is raised to 7.0 to 7.5, which is the most desirable range. It is OK if the pH is up near 8.0 after the neutralizer but not necessary for correcting corrosive water.
Q. Is there any other problem with using too much Corosex?
A. Yes, if too much Corosex is used, the media can cement together and form solid balls of Corosex in the neutralizer. If that happens, the Corosex filter media will not dissolve properly.
Q. What if i add only calcite and find out later that I need to raise my pH to a higher level?
A. This is not a big problem because some Corosex can be added on top of the existing calcite. As long as you don't fill the tank higher than about 2/3rds full it is OK.
Q. How much calcite or calcite-corosex blend media should I buy?
A. See table above to find your tank size. Generally it is rare for most families or home applications to use more than about 50 to 100 lbs a year. If you open up your neutralizer and find it is half-full, just add enough media to raise it to the 2/3rds level and backwash thoroughly.
Q. Does the media go bad? What if I have some left over?
A. No. The media does not go bad. Try to keep it dry and it will keep for many years. Even if its gets wet, it can still be used in most situations.
Q. What is Calcite anyway?
A. Calcite is a high grade of pure crushed and screened white marble limestone media which can inexpensively be used to neutralize acidic or low pH waters to a neutral, less corrosive effluent. Calcite is a naturally occurring calcium carbonate media.
Q. What is the advantage of calcite?
A. One of the advantages of Calcite is its self-limiting property. When properly applied, it corrects pH only enough to reach a non-corrosive equilibrium. It does not overcorrect under normal conditions.
Q. What is Corosex?
A. Corosex® (by Clack) is a highly reactive magnesium oxide, and is used most effectively where pH correction is substantial or high flow conditions are in use. Corosex can be effectively combined with Clack Calcite to combine the high flow neutralization properties of Corosex,along with the slower reacting low flow properties of Calcite, reducing potentially high basic properties due to over correction.
Q. What is the advantage of Corosex?
A. On a per weight basis, magnesium oxide can neutralize much more acidity than can calcium carbonate, (five timesas much). This results in greatly reduced chemical usage for the same pH correction. Please note, under certain low flowconditions, Corosex may overcorrect andcreate a highly basic (high pH) condition. It is better to use it in a 90% calcite to 10% Corosex or 80% calcite to 20% blend.
Q. Are either Calcite or Corosex toxic?
A. No, neither calcite nor Corosex are toxic and are widely used in drinking water. They have been tested and independenlty certified to ANSI/NSF Standard 60.
Any other questions? Please email us or call us toll-free at 888-600-5426.
|More information on Calcite Limestone Replacement Media:|
•Naturally occurring material
•Low uniformity coefficient for
maximum contact for controlled pH
•Slower reacting for controlled pH
•Color: Near white
•Bulk Density: 90 lbs./cu. ft.
•Mesh Size: 16 x 40
•Specific Gravity: 2.7
•Effective Size: 0.4 mm
•Uniformity Coefficient: 1.5
•Hardness: 3.0 (Mohs scale)
•Composition: CaCO3, 95% min.
MgCO3, 3.0% max.
CONDITIONS FOR OPERATION
•A gravel support bed is recommended
•Water pH range we recommend for calcite only neutralizers: 6.0-7.0
•Bed depth: 24-30 in.
•Freeboard: 50% of bed depth (min.)
•Backwash rate: 8-12 gpm/sq. ft.
•Backwash Bed Expansion: 35% of
•Service flow rate: 3-6 gpm/sq. ft. but
may be modified to adapt to local
|Calcite is a crushed and screened white marble media which can inexpensively be used to neutralize acidic or low pH waters to a neutral, less corrosive effluent.
Calcite is a naturally occurring calcium carbonate media. One of the advantages of Calcite is its self-limiting property.
When properly applied, it corrects pH only enough to reach a non-corrosive equilibrium. It does not overcorrect under normal conditions. Upon contact with Calcite, acidic waters slowly dissolve the calcium carbonate to raise the pH which reduces the potential leaching of copper, lead and other metals found in typical plumbing systems. Periodic backwashing will prevent packing, reclassify the bed and maintain high service rates. Depending on pH, water chemistry and service flow, the Calcite bed will have to be periodically replenished as the Calcite is depleted.
As the Calcite’s calcium carbonate neutralizes the water, it will increase
hardness and a softener may become necessary after the neutralizing filter, however most of our customers rarely find they need a softener.
Calcite can be effectively combined with Clack Corosex to combine the high flow neutralization properties of Corosex, along with the slower reacting low flow properties of Calcite, increasing the ability to correct low pH.
|More information on Corosex pH Replacement Media:|
|By neutralizing the free carbon dioxide in water, Corosex can correct acidic water conditions and render it less corrosive.
Corosex, being a highly reactive magnesium oxide, is used most effectively where pH correction is substantial or high flow conditions are in use.
pH correction and media consumption are affected by a number of water chemical variables. Being soluble to acidity, Corosex will slowly dissolve and will need to be replenished periodically.
On a per weight basis, magnesium oxide can neutralize much more acidity than can calcium carbonate, (five times as much). This results in greatly reduced chemical usage for the same pH correction.
Please note, under certain low flowconditions, Corosex may over-correct and create a highly basic (high pH) condition. Under certain hardness conditions, pH correction can cause hardness mineralsto precipitate out of solution, resulting in cementing or solidification of the Corosex mineral bed.
|If Corosex is used alone and not in a blend with Calcite, upflow service is generally recommended with hardness exceeding five grains per gallon.
(Always use an in-line filter ahead of an upflow neutralizer to prevent plugging of the lower distribution screen.)
As Corosex’s magnesium oxide neutralizes the water, it will increase hardness and a softener may become necessary after the neutralizing filter.
Corosex can be effectively combined with Clack Calcite to combine the high flow neutralization properties of Corosex, along with the slower reacting lowflow properties of Calcite, reducing potentially high basic properties due to overcorrection.
We recommend Corosex to be blended with Calcite at a ratio or 90% Calcite and 10% Corosex, or 80% Calcite to 20% Corosex. Corosex works better when used with a backwashing neutralizer filter.
|Free Illustrated Report with order: "How to Add Calcite and/or Corosex to Neutralizer Tank Down Flow and Up Flow Systems: Maintenance and Operation Guide "|
Need a new calcite acid pH neutralizer? See our advanced neutralizers here.
Read our report: "How to Treat Acid Well Water" using calcite neutralizers
Read our report: "How to Treat Copper Pipe Corrosion"
See our page on Acid Well Water and Low pH
Customer Ratings & Reviews