---
product_id: 1847723
title: "Tetra Pond 9-Watt Replacement UV Bulb for GreenFree UV Clarifier | For Greenfree UV Clarifier UVC-9, Replace Every Pond Season, Operates Up To 11 Months"
brand: "tetra"
price: "€ 36.39"
currency: EUR
in_stock: true
category: "Tetra"
url: https://www.desertcart.hr/products/1847723-tetra-pond-9-watt-replacement-uv-bulb-for-greenfree-uv
store_origin: HR
region: Croatia
---

# 8000-hour (11 months) lifespan Covers ponds up to 1,800 gallons 9W high-efficiency UV power Tetra Pond 9-Watt Replacement UV Bulb for GreenFree UV Clarifier | For Greenfree UV Clarifier UVC-9, Replace Every Pond Season, Operates Up To 11 Months

**Brand:** tetra
**Price:** € 36.39
**Availability:** ✅ In Stock

## Summary

> 💧 Clear your pond, clear your mind — algae-free living made effortless!

## Quick Answers

- **What is this?** Tetra Pond 9-Watt Replacement UV Bulb for GreenFree UV Clarifier | For Greenfree UV Clarifier UVC-9, Replace Every Pond Season, Operates Up To 11 Months by tetra
- **How much does it cost?** € 36.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/1847723-tetra-pond-9-watt-replacement-uv-bulb-for-greenfree-uv)

## Best For

- tetra enthusiasts

## Why This Product

- Trusted tetra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Seasonal Swap:** Replace every pond season to maintain peak algae-fighting efficiency and avoid green water FOMO.
- • **Powerful UV Clarity:** Harness 9 watts of UV light to obliterate algae reproduction and keep your pond crystal clear.
- • **Trusted Brand Legacy:** Backed by Tetra’s decades of aquatic expertise, ensuring reliable, professional-grade pond care.
- • **Optimized Pond Coverage:** Perfectly sized for ponds up to 1,800 gallons—ideal for your backyard oasis or water garden.
- • **Long-Lasting Performance:** Up to 11 months of continuous operation ensures season-long algae control without hassle.

## Overview

The Tetra Pond 9-Watt Replacement UV Bulb is engineered for the GreenFree UV Clarifier to deliver up to 11 months of continuous ultraviolet light that destroys algae reproduction in ponds up to 1,800 gallons. Designed for seasonal replacement, this high-efficiency bulb ensures your water garden stays clean, clear, and green-free, backed by Tetra’s trusted aquatic care expertise.

## Description

This replacement bulb is designed for use in TetraPond GreenFree UV Clarifier for ponds. This high-efficiency bulb has an 8,000-hour life, so it should be replaced after 11 months of continuous operation. Make sure to replace every pond season – the bulb may continue to glow, but its effectiveness in killing algae diminishes. Convenient viewing window in TetraPond GreenFree UV Clarifier makes it easy to ensure the bulb is working. Replacement bulbs are available in four sizes: 5 watts for ponds up to 660 gallons; 9 watts for up to 1,800 gallons; 18 watts for up to 4,400 gallons; and 36 watts for up to 8,800 gallons. TetraPond GreenFree UV Clarifier (not included) works to keep your pond clean, clear, and free of unsightly green algae. These dependable clarifiers use ultraviolet light to destroy suspended green algae. As algae are pumped into the clarifier, they are exposed to ultraviolet light that destroys the reproductive ability of single-celled algae. The dead algae are then pumped out of the TetraPond GreenFree UV Clarifier, where they clump and are removed by your pond's filtration system. Removes heavy algae blooms (usually within 8 days) and keeps the pond algae-free long-term. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need – from a large variety of quality fish food and innovative equipment to test kits and decor.

## Features

- REPLACEMENT BULB: For use in TetraPond GreenFree UV Clarifier to control heavy algae blooms in ponds and water gardens and keep water clean and green-free
- ULTRAVIOLET LIGHT: Destroys the reproductive ability of single-celled algae
- ANNUAL MAINTENANCE: Replace bulb every pond season for continued algae control
- HIGH-EFFICIENCY: For up to 11 months of continuous operation
- 4 AVAILABLE SIZES: 5 watts for ponds up to 660 gallons; 9 watts for up to 1,800 gallons; 18 watts for up to 4,400 gallons; and 36 watts for up to 8,800 gallons

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00474FIBG |
| Accepted Voltage Frequency | 100 to 120 Volts and 60 Hertz |
| Additional Features | Long Lasting |
| Best Sellers Rank | #29,128 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #99 in Water Garden & Pond Treatment |
| Brand Name | Tetra |
| Bulb Base | Wedge |
| Bulb Shape Size | F10 |
| Color | White |
| Color Rendering Index | 80 |
| Connectivity Technology | Normal bulb |
| Control Method | App |
| Controller Type | Push Button |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,308) |
| Global Trade Identification Number | 00046798195276 |
| Incandescent Equivalent Wattage | 40 watts |
| Indoor Outdoor Usage | Outdoor |
| Item Dimensions W x H | 1"W x 6.75"H |
| Item Type Name | Replacement Bulb |
| Item Weight | 1.6 ounces |
| Light Color | Green, clear |
| Light Output Maximum | 100 lumens |
| Light Source Operating Life | 8000 hours |
| Light Source Type | UV |
| Light Source Wattage | 9 watts |
| Light Type | Fluorescent |
| Manufacturer | TetraPond |
| Manufacturer Part Number | 19527 |
| Manufacturer Warranty Description | See label for details. |
| Material Type | Plastic |
| Model Name | Tetra |
| Model Number | 19527 |
| Number of Items | 1 |
| Package Quantity | 1 |
| Power Consumption | 9 watts |
| Power Source | Electric |
| Shape | Tubular(T) |
| Specific Uses For Product | Pond Algae Control |
| Style Name | Classic |
| UPC | 046798195276 |
| Unit Count | 1 Count |
| Voltage | 120 volts |
| Wattage | 9 watts |
| White Brightness | 100 lumens |

## Product Details

- **Brand:** Tetra
- **Bulb Shape Size:** F10
- **Light Type:** Fluorescent
- **Special Feature:** Long Lasting
- **Wattage:** 9 watts

## Images

![Tetra Pond 9-Watt Replacement UV Bulb for GreenFree UV Clarifier | For Greenfree UV Clarifier UVC-9, Replace Every Pond Season, Operates Up To 11 Months - Image 1](https://m.media-amazon.com/images/I/617cj4N26nL.jpg)
![Tetra Pond 9-Watt Replacement UV Bulb for GreenFree UV Clarifier | For Greenfree UV Clarifier UVC-9, Replace Every Pond Season, Operates Up To 11 Months - Image 2](https://m.media-amazon.com/images/I/51QuPJuJ5EL.jpg)
![Tetra Pond 9-Watt Replacement UV Bulb for GreenFree UV Clarifier | For Greenfree UV Clarifier UVC-9, Replace Every Pond Season, Operates Up To 11 Months - Image 3](https://m.media-amazon.com/images/I/21O7AR+jXQL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Who manufacturers the bulb? Philips? Osram?**
A: Philips is the manufacturer of our bulbs.

**Q: I currently have the tetrapond clear choice biofilter pf-1.  can i add this in between the tetra 550 pump & the filter?**
A: Yes, you sure can.  It goes outside the pond, so you'd put it a few feet from the inlet of the filter.

**Q: Is 9W bulb longer that 5W in length?**
A: The bulbs come in four sizes,viz 5W, 9W, 18W and 36W. I am pretty sure that the 9W will be bigger/longer than the 5W.

**Q: Need a philips tp16787 tetra 9watt replacrment lamp for the puv-1

is it still available**
A: i just listed 4 ---tetra 16787  --there not cheap and i only have 4 left ...

## Frequently Bought Together

- TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1)
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- API POND ALGAEFIX Algae Control 32-Ounce Bottle, FISHAQUARI (169G)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-03*