---
product_id: 1847723
title: "TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1)"
brand: "tetra"
price: "€ 29.71"
currency: EUR
in_stock: true
reviews_count: 9
category: "Tetra"
url: https://www.desertcart.sk/products/1847723-tetrapond-replacement-bulb-for-greenfree-uv-clarifier-for-clean-clear
store_origin: SK
region: Slovakia
---

# 8,000-hour (11-month) lifespan Covers ponds up to 1,800 gallons 9W high-efficiency UV power TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1)

**Brand:** tetra
**Price:** € 29.71
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your pond pristine and green-free—because your outdoor sanctuary deserves the best!

## Quick Answers

- **What is this?** TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1) by tetra
- **How much does it cost?** € 29.71 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/1847723-tetrapond-replacement-bulb-for-greenfree-uv-clarifier-for-clean-clear)

## 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

- • **Long-Lasting UV Power:** Up to 11 months of continuous algae control without losing effectiveness.
- • **Perfect Fit, Zero Hassle:** Exact replacement bulb designed for seamless installation in TetraPond GreenFree UV Clarifiers.
- • **Crystal Clear Ponds, Fast:** Destroys algae reproductive cells within 5 days for visibly cleaner water.
- • **Optimized for Mid-Sized Ponds:** 9-watt bulb ideal for ponds up to 1,800 gallons—perfect for your backyard oasis.
- • **Seasonal Maintenance Made Simple:** Replace annually to maintain peak algae-fighting performance and pond clarity.

## Overview

The TetraPond 9-Watt Replacement Bulb is a high-efficiency UV fluorescent bulb designed specifically for the GreenFree UV Clarifier. It delivers up to 8,000 hours (approximately 11 months) of continuous operation, effectively destroying algae reproductive cells to keep ponds up to 1,800 gallons clean and clear. Easy to install and recommended for annual replacement, this bulb ensures your pond remains free of unsightly green algae, enhancing the beauty and health of your water garden.

## 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.

Review: Twice the price of the non-brand uv bulbs: perhaps quality of Tetra reflects the higher price - exact replacement fitting for standard 9v uv bulb. it fit and it works very well. the cost is great I the bulb lasts a long time.
Review: Great Product I would buy it again A+ - Lasting longer than the original bulb that came with the pond fountain

## 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 | #25,642 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #83 in Water Garden & Pond Treatment |
| Brand | Tetra |
| 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 out of 5 stars 1,297 Reviews |
| Efficiency | 9 watts with algae control effectiveness within 5 days and up to 11 months |
| Global Trade Identification Number | 00046798195276 |
| Incandescent Equivalent Wattage | 40 Watts |
| Indoor Outdoor Usage | Outdoor |
| Is Electric | Yes |
| Item Dimensions W x H | 1"W x 6.75"H |
| Item Type Name | Replacement Bulb |
| Item Weight | 1.55 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) |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Long Lasting |
| 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

![TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/617cj4N26nL.jpg)
![TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1) - Image 2](https://m.media-amazon.com/images/I/51QuPJuJ5EL.jpg)
![TetraPond Replacement Bulb For GreenFree UV Clarifier, For Clean And Clear Ponds, 9-Watt, 1 Count (Pack of 1) - Image 3](https://m.media-amazon.com/images/I/21O7AR+jXQL.jpg)

## 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 ...

## Customer Reviews

### ⭐⭐⭐⭐⭐ Twice the price of the non-brand uv bulbs: perhaps quality of Tetra reflects the higher price
*by P***Y on April 21, 2025*

exact replacement fitting for standard 9v uv bulb. it fit and it works very well. the cost is great I the bulb lasts a long time.

### ⭐⭐⭐⭐⭐ Great Product I would buy it again A+
*by B***N on April 23, 2026*

Lasting longer than the original bulb that came with the pond fountain

### ⭐⭐⭐⭐⭐ I was very satisfied with my purchase
*by F***K on August 18, 2025*

This is a great UV light, at first I thought it would be too small to clear my water, but it turned out to be a good fit and my pond is clear and beautiful and my koi seem to love it.

## 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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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-05-24*