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Cost comparison
(Based on a 60cm filter)

Product	Cost	Life Expectancy	Cost over 12 years
Sand	$69.80	6 years	$139.60
Glass	$168	min. 12 years	$168*
Zeolite	$245 + salt $15 every 2-3 years	12 years if maintained properly	$320
* Glass provides added savings due to reduced chemical use and easier/less frequent backwashing!

Characteristic	Glass	Zeolite	Sand
Environmentally sound	•
Long lasting (2x longer or more)	•	•
Ionically charged (traps small particles)	•
Removes twice the iron and manganese	•
Self-sterilising	•
Reduced chemical use	•
Less likely to block or channel	•
Requires a salt bath		•
Requires more water for backwash		•	•
Requires more chemicals		•	•
Class 2 carcinogen		•	•
Harmful to breathe		•	•
Surface houses bacteria		•	•
Strip mined, depletes our environment		•	•
Source: Grand River Recycled Glass, Grand Rapids, Michigan 49525, USA