Celatom Diatomaceous Earth DE Pool Filter Aid - 25 Lbs Powerful

In this review the Celatom diatomaceous earth (DE) filter aid is evaluated for pool and spa owners who want crystal clear water with less chemical use. The bottom line: this 25 lb bag is for anyone using a DE or earth-style cartridge filter who needs an efficient, fine media that traps particles down to 2 microns and improves overall filter productivity. The reviewer found the material delivers noticeably clearer water and reduces shock and chlorine demand, though handling requires care because the product is dusty when scooping.

Key Features

• High filtration efficiency: Removes particles down to 2 microns so pools and spas look clearer and feel cleaner.
• Long industry pedigree: Celatom DE is an established filter aid used for over 50 years, giving confidence in consistent performance.
• Reduces chemical use: By improving filtration clarity, it can lower chlorine and shock frequency when the pool is properly balanced.
• Easy mixing and application: The DE mixes into a slurry in a pail and is added to the skimmer for straightforward dosing into most DE filters.
• Productive for filters: Enhances filter productivity and helps capture particles associated with recreational water illness.

Who It's For

This product is aimed at homeowners and service professionals using DE-style pool and spa filters who want the finest filter media to capture very small particles and improve overall water clarity. It is also suited to anyone trying to reduce ongoing chemical usage by improving mechanical filtration.

Those who should look elsewhere include pools with cartridge or sand-only filtration systems that do not accept DE media, and users who cannot safely manage dusty powder - a respirator or careful scoop technique is recommended because of the dustiness noted by some customers.

Pros & Cons

Pros

• Very fine filtration captures particles down to 2 microns for superior clarity.
• Trusted formulation with over 50 years of use in the pool industry.
• Improves filter productivity and often reduces chlorine and shock needs.
• Reasonable 25 lb bag size for medium to large pools with predictable dosing.

Cons

• Product is dusty when scooping, so users should take precautions to avoid inhalation and mess.

Specifications

Product	Celatom diatomaceous earth (DE) filter aid
Weight	25 lbs
Filtration rating	Removes particles down to 2 microns
Application	Swimming pool and spa DE filters
Dosing guideline	About 1 lb per 10 sq ft of filter area; mix into a slurry and add via skimmer
Manufacturer history	Used for over 50 years by EP Minerals under the Celatom name

Our Verdict

For DE filter users who want top-tier clarity, the Celatom 25 lb bag is a dependable, time-tested choice that improves water clarity and can reduce chemical use when combined with proper pool balance. It is good value for routine maintenance, but handle carefully to minimize dust during application.

Frequently Asked Questions

How much DE do I add to my filter?
Apply approximately 1 lb of DE per 10 sq ft of filter area; for example a 60 sq ft filter would use about 6 lbs.

How is DE applied to the filter?
Mix the required amount into a pail of water to create a slurry, then feed it into the filter by adding the slurry to the pool skimmer while the pump is running.

How often should I clean the DE filter?
Diatomaceous earth filters should be cleaned at least once per year, with frequency increasing based on usage and pressure rise.