---
product_id: 340684385
title: "Brightwell Aquatics MicroBacter Start XLM - Concentrated Freshwater Nitrifying Bacteria - Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering - Aquarium Water Treatments, 33.8 fl oz"
brand: "brightwell aquatics"
price: "E£ 23837"
currency: EGP
in_stock: true
reviews_count: 5
category: "Brightwell Aquatics"
url: https://www.desertcart.com.eg/products/340684385-brightwell-aquatics-microbacter-start-xlm-concentrated-freshwater-nitrifying-bacteria-quick
store_origin: EG
region: Egypt
---

# 15x concentrated power reduces ammonia & nitrite cycles tank in 7 days Brightwell Aquatics MicroBacter Start XLM - Concentrated Freshwater Nitrifying Bacteria - Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering - Aquarium Water Treatments, 33.8 fl oz

**Brand:** brightwell aquatics
**Price:** E£ 23837
**Availability:** ✅ In Stock

## Summary

> ⚡ Dive into a thriving aquarium ecosystem—faster, cleaner, stronger!

## Quick Answers

- **What is this?** Brightwell Aquatics MicroBacter Start XLM - Concentrated Freshwater Nitrifying Bacteria - Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering - Aquarium Water Treatments, 33.8 fl oz by brightwell aquatics
- **How much does it cost?** E£ 23837 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.eg](https://www.desertcart.com.eg/products/340684385-brightwell-aquatics-microbacter-start-xlm-concentrated-freshwater-nitrifying-bacteria-quick)

## Best For

- brightwell aquatics enthusiasts

## Why This Product

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

## Key Features

- • **High-Density Tank Savior:** Scientifically crafted to reduce toxic ammonia and nitrite even in crowded, high-population tanks.
- • **Proudly American-Made Quality:** Backed by microbiological science and crafted in the USA for unmatched reliability and shelf stability.
- • **Fast-Track to Aquarium Stability:** Achieve a balanced nitrogen cycle in just 7 days—because your aquatic ecosystem deserves no downtime.
- • **Post-Cleaning & Medication Rescue:** Rapidly re-establish beneficial bacteria after tank maintenance or treatments to keep fish thriving.
- • **Turbocharge Your Tank's Microbial Life:** 15x concentrated formula jumpstarts biological filtration faster than ever.

## Overview

Brightwell Aquatics MicroBacter Start XLM is a 33.8 fl oz concentrated freshwater nitrifying bacteria solution designed to rapidly establish and maintain biological filtration in new or existing aquariums. Its 15x strength formula accelerates tank cycling, typically stabilizing water chemistry within 7 days by reducing harmful ammonia and nitrite levels. Ideal for high-density tanks and post-cleaning recovery, this shelf-stable, American-made product ensures a healthy, balanced aquatic environment for all life stages.

## Description

Brightwell Aquatics MicroBacter Start XLM Experience a new level of aquarium care with Brightwell Aquatics MicroBacter Start XLM – the ultimate solution for achieving a balanced and thriving aquatic environment. Our concentrated formula is designed to establish a new nitrogen cycle or boost an impaired one, ensuring the rapid establishment of biological filtration and creating a stable habitat for your aquatic companions. It’s particularly useful for new startups, resulting in tank cycling in 7 days in most cases. Also useful in emergencies or after medications to re-establish damaged bacteria beds. This advanced blend works effectively to break down nitrogenous waste, keeping your aquarium water pristine. It is meticulously formulated to enhance water quality and eliminate ammonia and nitrite spikes. Whether you're setting up a new tank or maintaining an established one, MicroBacter Start XLM is your go-to solution. Its versatility extends to marine and brackish aquariums, providing powerful support for a diverse range of aquatic environments. FEATURES AT A GLANCE Super concentrated 15x strength formula Useful for rapidly re-establishing nitrification bacteria in case of an emergency Usually cycles in 7 days Ideal in aquaria with high population densities and when adding new fish Best used post-cleaning of rocks and surfaces or after use of medication Prevents “New Tank Syndrome” Supplied in a proprietary base for maximum longevity Formulated utilizing extensive data compiled by microbiologists AMERICAN-MADE EXCELLENCE Trust in the quality and excellence of Brightwell Aquatics, an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently strive to deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium.

Review: Great to help set up aquarium. Help speed up the process of the new start tank.
Review: If you want to create a New Reef tank in Hurry it's one of the Best Bacteria for Cycle in Tank in 1-2 days. I recorded the results every 2 hours and it's amazing that in first 2 hours it's starts the Ammonia up and down by 4-5 hours and N02 becomes high and down 7-9 hours and N03 takes time little bit more like 22-30 hours. but 38-40 hours its everything in low and as per reef condition. But have to use Bio Media like Live Rock or Carabsea Sand. For my Tank I used CarabSea Life Rock 20 LBS, Carabsea Life Sand (White and Purple) with Reef Sea Reef Salt-Blue one (not Red sea Coral Pro). I don't Turn on the light more than 6 hours in first 2 days and in Day three i Added two SPS and 3 LSP and it's Perfect. PH-8.2, Alkalinity - 9 and Salinity 1.35 now my tank is running perfectly and after 2 days I turn on Light and Protein Skimmer. Money worth with this bacteria

## Features

- HIGH-POWER TANK WATER STARTER – MicroBacter Start XLM is a powerful 15x concentrated blend designed to kickstart biological filtration in new and existing saltwater aquariums. It enhances water quality, providing a flourishing underwater environment with live, non-pathogenic microbes
- RAPID WATER CYCLING – Optimize your aquarium’s health swiftly with this fast-acting supplement. Quickly accelerate the tank's beneficial nitrifying bacteria colonization rates for balance and stability in just 7 days in most cases. It’s the ideal solution when time is crucial
- FOR HIGH-DENSITY AQUARIUMS – A scientifically blended formula that assists crowded tanks and effectively reduces ammonia and nitrite levels, all while supporting population density. Supplied in a proprietary base, providing maximum longevity in shipping and in your aquatic ecosystem. Shelf stable for over a year at room temperature
- ADVANCED TANK RECOVERY – Perfect for all levels of aquarium enthusiasts and compatible with various sand and rock substrates. Also best used post-cleaning or after use of medications. This solution accelerates the re-establishment rate of fish tank bacteria, after upsets, ensuring your fish thrive
- AMERICAN-MADE EXCELLENCE – Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B082BWZKSM |
| Allergen Information | Sulphites Free |
| Batteries Included | No |
| Best Sellers Rank | #71,532 in Pet Supplies ( See Top 100 in Pet Supplies ) #4,335 in Aquarium Accessories |
| Customer Reviews | 4.2 4.2 out of 5 stars (75) |
| Date First Available | 14 December 2019 |
| Item Form | Liquid |
| Item Weight | 1 Kilograms |
| Item model number | BACSTARTXLM1L |
| Number of Items | 1 |
| Package Dimensions | 24.51 x 7.9 x 7.9 cm; 1 kg |
| Pet Life Stage | All Life Stages |
| Quantity | 1 |
| Size | 1-L |
| Specific Uses | fish |
| batteries required | No |

## Product Details

- **Brand:** Brightwell Aquatics
- **Item form:** Liquid
- **Item weight:** 1 Kilograms
- **Liquid volume:** 1 Liters
- **Manufacturer:** Brightwell Aquatics

## Images

![Brightwell Aquatics MicroBacter Start XLM - Concentrated Freshwater Nitrifying Bacteria - Quick Start Fish Tank Starter, Lift Microbe Levels & Water Filtering - Aquarium Water Treatments, 33.8 fl oz - Image 1](https://m.media-amazon.com/images/I/71PnLTuk8gL.jpg)

## Questions & Answers

**Q: Does this ship with ice packs? How is it insured the bacteria will be alive still after spending all day in a hot 100-110 F delivery truck?**
A: It does not ship with ice packs.  It is a much more stable product than older competing products.  It will typically stand hot delivery trucks for short periods of time and it will typically take a freeze and still be viable, if thawed slowly (never microwave).  Can it be killed in transit, yes, but it is not very likely.  If you ever have a problem, please contact us and we will make sure you are satisfied.  Thanks for the question.

**Q: Am i understanding this correctly, you can’t use this product with caribsea dry live rock starting a new tank from scratch?**
A: You can use it with dry rock that has been seeded with dry bacteria, but that bacteria is the wrong species to use at this stage of cycling and will prolong the cycle to a month or even longer.  MicroBacter Start XLM will still work, but not as efficiently because they will be fighting the other bacteria for nutrients and the different species can even consume each other.  You will be better off using real live rock, or Real Reef Rock (TM), rock from another aquarium or a store, bare rock from the land, marco rock or any rock to which dry bacteria has NOT been added.  Let XLM work alone and it will do its job wonderously, or use it with normal aquarium bacteria (as in rock kept in an aquarium).  If you use dry cysted bacteria, it will cause problems, but in the end you will still cycle (and it will be a good cycle, it will just take a prolonged time to cycle).  We just recommend against using other packaged or dry bacterial products at the same time.  If you have further questions, or need specific help, please fill out our web form or contact the factory, we will be happy to help.

**Q: Is there a way to use this if I have already put live sand in the tank?**
A: I use it all the time and my tank has live sand and live rocks. My tank is 3 years old and established.   I think it depends upon if your tank is new and on its first cycle or if it is an established tank and you are doing a water change, etc.  I believe a first time new tank is where the problem with live sand comes in.  Hope this helps.

**Q: Can i use this product when adding new fish to an stable reef tank?**
A: Yes. I am using this product for last 2 years. Every weekend I put to control on Algee grow problems. But I really don’t understand what’s the relation between adding new fish with this product? When we add new fish we not use KH, CA or MG liquids to maintain Aquarim parameters ? I think you got your answer with logic

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***D on 25 May 2025*

Great to help set up aquarium. Help speed up the process of the new start tank.

### ⭐⭐⭐⭐⭐ Review
*by A***Y on 9 March 2020*

If you want to create a New Reef tank in Hurry it's one of the Best Bacteria for Cycle in Tank in 1-2 days. I recorded the results every 2 hours and it's amazing that in first 2 hours it's starts the Ammonia up and down by 4-5 hours and N02 becomes high and down 7-9 hours and N03 takes time little bit more like 22-30 hours. but 38-40 hours its everything in low and as per reef condition. But have to use Bio Media like Live Rock or Carabsea Sand. For my Tank I used CarabSea Life Rock 20 LBS, Carabsea Life Sand (White and Purple) with Reef Sea Reef Salt-Blue one (not Red sea Coral Pro). I don't Turn on the light more than 6 hours in first 2 days and in Day three i Added two SPS and 3 LSP and it's Perfect. PH-8.2, Alkalinity - 9 and Salinity 1.35 now my tank is running perfectly and after 2 days I turn on Light and Protein Skimmer. Money worth with this bacteria

### ⭐⭐⭐⭐⭐ Review
*by D***N on 10 October 2023*

I have been a Brightwell user fro many years, but this product stands out in their lineup. I have used this to start 5 aquariums now, including 2 systems over 800 total gallons. It cycles the tank quickly and gets it safe for fish. I do not follow the instructions to add fish to cycle. I use an ammonia source, such as Fitz Ammonium Chloride to kickstart the cycle.

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*Product available on Desertcart Egypt*
*Store origin: EG*
*Last updated: 2026-02-08*