Zapp Pure UV Sterilizer – ZP-20
PondRX is proud to offer the Zapp Pure line of high-performance ultraviolet sterilizers. This UV sterilizer is designed to effectively control pond algae and works seamlessly with low amperage pumps and high-flow filtration systems, such as the AlphaOne Koi Pond Filtration System and AquaBead line.
The ZP-20 model has a 4-inch vessel with 2-inch inlets and outlets, ensuring no flow restrictions. It delivers an impressive 70,000 microwatts of UV output, one of the highest in the industry.
Designed for ponds up to 20,000 gallons with flow rates of 6,000 gallons per hour, the ZP-20 provides reliable algae control and water clarity.
| Specification | Detail |
|---|---|
| Model | ZP-20 |
| Height | 43 inches |
| Flow Rate Support | Up to 6,000 gallons per hour |
| UV Output | 70,000 microwatts |
| Compatible Pumps | Low amperage pumps |
| Compatible Filters | High flow filters, such as AlphaOne and AquaBead systems |
FAQ
What is the maximum pond size compatible with the ZP-20 UV sterilizer?
The ZP-20 is designed for ponds up to 20,000 gallons.
Does the ZP-20 work with high-flow filtration systems?
Yes, it is specifically designed to work with high-flow filters such as the AlphaOne and AquaBead lines.
What is the UV output power of the ZP-20?
The ZP-20 delivers 70,000 microwatts of UV output.

Kevin Jackson –
Installed the ZP-20 in my 18,000-gallon koi pond last summer. Algae levels dropped noticeably within a week. The unit handles the high flow from my AlphaOne filter without any pressure issues. Works reliably and maintains clear water year-round.
Dylan Springer –
Good performance in controlling green algae. The 4-inch vessel fits well and doesn’t restrict water flow. Works well with my AquaBead filter. Slight improvement in water clarity after two months of use.
Nathan Jones –
After switching from a standard UV unit, I noticed a significant reduction in algae blooms. The 70,000 microwatt output is impressive and the unit is quiet and efficient. No maintenance needed beyond cleaning the quartz sleeve every few months.