---
title: What's The Difference Between SMART Plus, SMART Ultimate, and SMART Ultra?
description: Learn the difference between Crystal Quest SMART Plus, SMART Ultra, and SMART Ultimate filtration cartridges.
---
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# What's The Difference Between SMART Plus, SMART Ultimate, and SMART Ultra?
## SMART Ultra lasts longer than SMART Plus, and SMART Ultimate has the longest filtration media lifespan of all three.
The difference between **SMART Plus, SMART Ultra, and SMART Ultimate** is primarily the **filtration capacity and lifespan** of the cartridge — not the types of contaminants removed.
All three use the same **SMART multi-media filtration technology**, but they contain **different amounts of ERA (Eagle Redox Alloy® / KDF® blends)**. As you move from **SMART Plus → SMART Ultra → SMART Ultimate**, the cartridge contains **more ERA media**, which allows it to treat **more water over a longer period of time**.
In simple terms:
- **SMART Plus** – Standard lifespan and capacity, ideal for typical residential use
- **SMART Ultra** – Longer lifespan than Plus, commonly chosen by households with higher daily usage or those who want fewer cartridge changes
- **SMART Ultimate** – Longest lifespan and highest filtration capacity, best for customers who want maximum longevity and minimal maintenance
The increased amount of ERA media in the Ultra and Ultimate models does **not add new contaminant categories**, but it does allow the cartridge to:
- Maintain performance over **more total gallons**
- Handle **higher usage** more effectively
- Provide **more consistent filtration performance over time**
### Capacity comparison (varies by cartridge size):
- **SMART Ultra** offers roughly **25–50% more capacity** than SMART Plus
- **SMART Ultimate** offers roughly **50–100% more capacity** than SMART Plus
All capacity ratings are based on **water hardness below 100 ppm** and proper operating conditions.
### How most customers choose:
- **SMART Plus** for standard residential needs
- **SMART Ultra** if you want **longer life and fewer replacements**
- **SMART Ultimate** if you prefer the **longest possible lifespan with the least maintenance**
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