---
product_id: 6811924
title: "Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351"
price: "279 Lei"
currency: RON
in_stock: true
reviews_count: 12
url: https://www.desertcart.ro/products/6811924-fluval-cycle-biological-enhancer-aquarium-water-treatment-16-9-oz
store_origin: RO
region: Romania
---

# 16.9 oz volume Beneficial bacteria infusion All-natural formula Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351

**Price:** 279 Lei
**Availability:** ✅ In Stock

## Summary

> 🌊 Dive into a healthier aquarium experience!

## Quick Answers

- **What is this?** Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351
- **How much does it cost?** 279 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/6811924-fluval-cycle-biological-enhancer-aquarium-water-treatment-16-9-oz)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Create a Safe Haven:** All-natural water care eliminates ammonia and nitrite, ensuring a safe habitat for your aquatic friends.
- • **Perfect for New Setups:** Essential for new aquariums or introducing new fish, making transitions seamless and stress-free.
- • **Instant Bacterial Boost:** Infused with powerful beneficial bacteria that inoculates your aquarium water immediately.
- • **Regular Use, Healthy Fish:** Consistent application prevents the establishment of undesirable bacteria, promoting a thriving ecosystem.
- • **Versatile for All Aquariums:** Suitable for both freshwater and saltwater environments, making it a must-have for every fish enthusiast.

## Overview

FluvalCycle Biological Enhancer is a 16.9 oz liquid treatment designed to create a safe biological habitat in aquariums. It effectively eliminates harmful ammonia and nitrite, infused with beneficial bacteria to support new setups and maintain water quality. Ideal for both freshwater and saltwater aquariums, this allergen-free solution ensures your fish thrive.

## Description

desertcart.com : Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351 : Aquarium Treatments : Pet Supplies

Review: Water changes - Fluval Cycle Biological Enhancer works exactly as described. It helped establish beneficial bacteria quickly and made cycling my aquarium much smoother. My fish showed less stress, and water parameters stabilized faster than usual. A must-have for new tank setups and water changes.”
Review: Recd new - Great item

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.7 4.7 out of 5 stars (3,205) |

## Images

![Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351 - Image 1](https://m.media-amazon.com/images/I/71qzj+FGElL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Water changes
*by N***E on December 16, 2025*

Fluval Cycle Biological Enhancer works exactly as described. It helped establish beneficial bacteria quickly and made cycling my aquarium much smoother. My fish showed less stress, and water parameters stabilized faster than usual. A must-have for new tank setups and water changes.”

### ⭐⭐⭐⭐⭐ Recd new
*by A***N on January 25, 2026*

Great item

### ⭐⭐⭐⭐⭐ Great stuff, just what I needed to set up a brand new Aquarium
*by J***S on April 16, 2014*

This stuff is a absolute necessity, If you're new to owning fish or If you just want to set up a brand new tank. You need this Beneficial Bacteria to start up the Nitrogen Cycle in your tank and this is the best way to get it. For those who's new to owning fish or who doesn't know what the nitrogen cycle is and why it is important to your fish to keep them healthy, Im going to explain the easy way. Basically What the Nitrogen Cycle is and why is it important to your fish is because the Nitrogen Cycle is the process of GOOD BACTERICA that is introduced into your tank to help lower the Ammonia, Phosphates, Nitrate Levels that builds naturally from your fish, Un eaten food, and its Poop. Ammonia is the LEADING CAUSE OF FISH Death is given out naturally through your fish's Gills or its POOP, or uneaten food. now back to the Nitrogen CYCLE, which is very easy to understand if explained easliy with out all its technical mumbo jumbo.its basically the introduction of the GOOD bacteria into your tank, now your Ammonia, Nitrate, and Phosphate levels will go up, but don't worry its Suppose to do that, so don't go crazy doing water changes or adding chemicals to lower these levels no. The Beneficial Bacteria will do that for you in that case will provide a healthy Environment for your fish because the bacteria will eat up all the bad stuff your fish gives out. now your will have to monitor these Ammonia, Nitrate,Nitrate, and Phosphate levels with a test kit., and simply test everyday until you see the levels go all the way down to 0% once you see that all dropped all the way down then your tank has successfully gone through the Nitrogen Cycle and only then it is safe to start introducing fish into your new tank, as this procedure (Nitrogen Cycle) is only needed if you are setting up a brand new tank that is fresh out the box(if ordered online) or fresh out the pet store.

## Frequently Bought Together

- Fluval Cycle Biological Enhancer, Aquarium Water Treatment, 16.9 Oz., A8351
- Fluval Waste Control Biological Cleaner, Aquarium Water Treatment, 8.4 Oz., A8355
- Fluval AquaPlus Water Conditioner, Aquarium Water Treatment, 16.9 Oz., A8344

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-20*