---
product_id: 19629336
title: "Pond Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains"
brand: "tetra"
price: "€ 17.92"
currency: EUR
in_stock: true
reviews_count: 8
category: "Tetra"
url: https://www.desertcart.nl/products/19629336-pond-fountain-block-6-count-controls-algae-growth-in-ornamental
store_origin: NL
region: Netherlands
---

# 10-day slow dissolve Controls algae growth Treats up to 280 gallons Pond Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains

**Brand:** tetra
**Price:** € 17.92
**Availability:** ✅ In Stock

## Summary

> 💧 Clear water, zero hassle—your fountain’s new best friend!

## Quick Answers

- **What is this?** Pond Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains by tetra
- **How much does it cost?** € 17.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/19629336-pond-fountain-block-6-count-controls-algae-growth-in-ornamental)

## 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

- • **Broad Coverage:** One block treats between 30 and 280 gallons, perfect for various fountain sizes.
- • **Long-Lasting Formula:** Each block slowly dissolves over 10 days, providing continuous protection.
- • **Effortless Algae Control:** Keep your ornamental fountains crystal clear without daily maintenance.
- • **Plant-Safe Usage Reminder:** Ideal for containerized fountains without live plants, ensuring safe and effective treatment.
- • **Vacation-Proof Maintenance:** Reliable algae control even when you’re away—come back to pristine water.

## Overview

Tetra Pond Fountain Block is a slow-release algae control tablet designed for ornamental fountains and containerized ponds. Each block dissolves over approximately 10 days, effectively preventing and clearing algae blooms in water volumes ranging from 30 to 280 gallons. Easy to use and ideal for maintenance-free algae management, it’s not recommended for use with live plants.

## Description

TetraPond® Fountain Block® helps to clear cloudy water and control algae growth in ornamental fish ponds. These blocks are ideal for containerized ponds and fountains – not recommended for use with live plants. Use one TetraPond Fountain Block for water volumes between 100 gallons (380 L) and 250 gallons (950 L). For the initial dose, add one block for each 100 gallons (380 L) of pond/fountain water. For regular maintenance, replace block(s) after previous block(s) have fully dissolved, usually after 30 days. Algae are primitive plants that, via photosynthesis, combine water and carbon dioxide to form sugars for energy and growth. Algae can obscure colorful fish and deplete valuable oxygen. No pond is ever totally free of algae, but in a balanced environment and with the right treatment methods, algae can be kept in check. 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: Algae Under Control - I've been looking for a quality algae control for awhile. The liquid ones have gone up in price but don't really control the algae that grows in my fountain. This one does the trick and is reasonably priced. We placed this in the fountain and it goes to work. No need to remember to add it quickly. We were gone on vacation and thought for sure we would need to clean the fountain upon our return, but no, the algae block did its job. Would definitely recommend if you have an algae problem.
Review: Excellent product - I use this product in my garden fountains and have found it to be the best product to keep my fountains from getting algae. Very convenient and easy to use. I put this in my fountains every two weeks.

## Features

- CONTROLS ALGAE: Helps prevent algae growth in ornamental water fountains and ponds.
- SLOW RELEASE: Blocks fully dissolve slowly after about 10 days.
- FOR CONTAINERIZED FOUNTAINS & PONDS: Not recommended for containers with live plants.
- EASY TO USE: One block treats between 30 and 280 gallons of water.
- CLEARS ALGAE BLOOMS: Each block dissolves to control algae and clear algae blooms.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Tetra |
| Customer Reviews | 4.2 out of 5 stars 1,586 Reviews |
| Item Form | Tablets |
| Item Weight | 0.01 Ounces |
| Liquid Volume | 10 Milliliters |
| Manufacturer | TetraPond |
| UPC | 707005178078 046798167372 |

## Product Details

- **Brand:** Tetra
- **Item Form:** Tablets
- **Item Weight:** 0.01 Ounces
- **Liquid Volume:** 10 Milliliters
- **Manufacturer:** TetraPond

## Images

![Pond Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains - Image 1](https://m.media-amazon.com/images/I/81oYdPeS4LL.jpg)

## Questions & Answers

**Q: Do you have to clean out the algae before using this product?**
A: Thank you for your question, Donna!  We do recommend cleaning it out, if possible, as this product is more of a preventative product.  It doesn't work as well at killing algae that is present as it does at preventing it from occurring.  Customers rave about this product when put in prior to algae growth.  So if you clean out your fountain first, then refill it and drop this in, you should not have algae the rest of the season.

**Q: I have a lot of birds drinking from my fountain now, are the Flountain blocks safe for wildlife?**
A: Customer feedback over the years has indicated that these are safe for birds.  However, we want you to be aware that we have not tested them specifically for this purpose, and cannot guarantee the safety of the birds.  They do dissolve slowly, and are very diluted in the fountain.

**Q: will this item harm birds drinking from the fountain?**
A: Birds did drink from fountain but have no way of knowing if it harmed them.  Does say not to use with plants and may be toxic to fish.   Was getting lots of green algae.  Started using PHYSAN 20.  Just a few drops each week.  Water is so clear and haven't had any algae.  Water will foam up when more water is added but doesn't last.  Always have a block in the fountain as a back up

**Q: Do you place the block on the fountain "floor" or do you need to place it in a floating container?**
A: Thank you for your question. The Tetra Pond Fountain Block is typically placed at the bottom of a fountain reservoir where it can gradually dissolve to control algae growth. If you have additional questions you can call Pond and Garden Depot toll free at 1-866-305-5459.

Sincerely,
Keith H.
Customer Service

## Customer Reviews

### ⭐⭐⭐⭐⭐ Algae Under Control
*by D***. on April 22, 2025*

I've been looking for a quality algae control for awhile. The liquid ones have gone up in price but don't really control the algae that grows in my fountain. This one does the trick and is reasonably priced. We placed this in the fountain and it goes to work. No need to remember to add it quickly. We were gone on vacation and thought for sure we would need to clean the fountain upon our return, but no, the algae block did its job. Would definitely recommend if you have an algae problem.

### ⭐⭐⭐⭐⭐ Excellent product
*by G***M on July 16, 2025*

I use this product in my garden fountains and have found it to be the best product to keep my fountains from getting algae. Very convenient and easy to use. I put this in my fountains every two weeks.

### ⭐⭐⭐⭐ Smaller than Expected!
*by A***R on September 10, 2019*

Product works well. I've been using this product for quite a few months. Used to get it in larger size (28 g each). This is only 12 g each. Unfortunately, the larger size in bulk cannot be sent to CA, because of Prop65 (what a joke!). Widh they can sell the larger (28 g) size block in small quantity to get around CA Prop65. All in all, am satisfy with the product performance. Just make sure you are aware that this is only 12 g each, good for treating 30 - 100 gals.

## Frequently Bought Together

- Tetra Pond Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains
- EasyCare FounTec Algaecide and Clarifier, 8 oz. Bottle
- Fountain Algaecide and Clarifier - 8oz - Kills and Inhibits All Types of Algae Growth, Formulated for Small Ponds and Water Features, Treats up to 8,000 Gallons

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nl/products/19629336-pond-fountain-block-6-count-controls-algae-growth-in-ornamental](https://www.desertcart.nl/products/19629336-pond-fountain-block-6-count-controls-algae-growth-in-ornamental)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-10*