---
product_id: 36788255
title: "MicroBacter7 Complete Bioculture for Fish Tank or Aquarium - Populates Biological Filter Media for Saltwater and Freshwater Fish - Aquarium Water Treatments, 4.2 fl oz"
brand: "brightwell aquatics"
price: "$21.96"
currency: USD
in_stock: true
reviews_count: 13
category: "Brightwell Aquatics"
url: https://www.desertcart.us/products/36788255-microbacter7-complete-bioculture-for-fish-tank-or-aquarium-populates-biological
store_origin: US
region: United States of America
---

# Supports salt & freshwater tanks Reduces nitrates to 0.1 ppm 7-strain microbial blend MicroBacter7 Complete Bioculture for Fish Tank or Aquarium - Populates Biological Filter Media for Saltwater and Freshwater Fish - Aquarium Water Treatments, 4.2 fl oz

**Brand:** brightwell aquatics
**Price:** $21.96
**Availability:** ✅ In Stock

## Summary

> 🧬 Elevate your aquarium’s ecosystem — clarity and balance in every drop!

## Quick Answers

- **What is this?** MicroBacter7 Complete Bioculture for Fish Tank or Aquarium - Populates Biological Filter Media for Saltwater and Freshwater Fish - Aquarium Water Treatments, 4.2 fl oz by brightwell aquatics
- **How much does it cost?** $21.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/36788255-microbacter7-complete-bioculture-for-fish-tank-or-aquarium-populates-biological)

## 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

- • **Microbial Mastery:** Advanced aerobic & anaerobic bacteria for superior filtration and water clarity
- • **Nitrate Neutralizer:** Enzymatic action reduces nitrates to near zero, preventing toxic buildup
- • **Dual Ecosystem Support:** Optimized for both marine and freshwater aquariums, ensuring versatile use
- • **Organic Waste Breakdown:** Accelerates degradation of organic carbon, ammonia, and phosphates for a pristine tank
- • **Made in the USA with Science:** Veterinarian-tested formula delivering reliable, professional-grade aquatic care

## Overview

Brightwell Aquatics MicroBacter7 is a scientifically formulated liquid bioculture containing a complex blend of aerobic and anaerobic bacteria plus natural enzymes. Designed for both saltwater and freshwater aquariums, it accelerates nitrification and denitrification processes, drastically reducing nitrates, ammonia, and phosphates to promote crystal-clear water and a healthy aquatic environment. Trusted by professionals and made in the USA, it’s the go-to solution for maintaining balanced, thriving fish tanks.

## Description

Brightwell Aquatics MicroBacter7 Complete Bioculture for Fish Tank or Aquarium Experience a new level of aquatic care with Brightwell Aquatics MicroBacter7 Complete Bioculture for Fish Tank or Aquarium – the ultimate solution for achieving a balanced and thriving aquatic environment. This advanced microbial formula is rigorously tested and recommended by veterinarian pathologists, establishes biological filtration in new aquarium setups and accelerates the rates of nitrification, denitrification, and organic waste degradation in marine and freshwater aquaria. The bacteria supplement offers unparalleled reliability. While rapidly reducing hydrogen sulfide production to increase dissolved oxygen levels, it also decreases levels of organic carbon, ammonia, nitrite, nitrate, and phosphate, establishing a cleaner substrate. As a result, it inhibits the growth of undesirables and improves the overall water clarity of your aquarium. If you're setting up a new aquarium or fish tank, the MicroBacter7 Bacteria Water Conditioner is your go to solution. Its versatility extends to both freshwater and saltwater aquariums, providing powerful support for a diverse range of aquatic environments. FEATURES AT A GLANCE Advanced Microbial Formula Comprehensive Nutrient Remineralization Targeted Nutrient Reduction Enhanced Water Quality Prevents Growth of undesirable substances Reduced Hydrogen Sulfide Production Veterinarian Pathologist Tested and Recommended

Review: Works as intended - 0 nitrates - This stuff works as intended. I will be honest, I thought this was a type of bacteria to boost bacteria biodiversity, and technically it is but it is mostly an enzyme to tackle nitrates in your tank. Ever since I've dosed this my tank has stayed at 0-.1 nitrates which can be good at times. But some nitrate can help foster coral growth. And ever since I've dosed this, my corals haven't grown as fast as they used to. So I would say this product is great for when your tank has been established and you want to "freeze" your tanks growth. But for new tanks I would stay away for awhile and instead buy brightwell clean which has the bacteria to broaden your bacteria biodiversity. The enzymes in this product eat at the nitrates and turn it into nitrogen gas which completely eliminates nitrates so if you want some nitrates, use this product with caution. But if i had done my research and used this product as intended, it did exactly what it was meant for.
Review: Saved my fish - Excellent product. Thank you so much 🙏

## Features

- ADVANCED MICROBIAL FORMULA – MicroBacter7 has a complex system of non-pathogenic aerobic and anaerobic microbes, and natural enzymes. This unique bacteria water conditioner is specifically designed as an aquarium water clarifier and filtration system
- NUTRIENT REMINERALIZATION – The MicroBacter7 formula introduces aquarium bacteria to enhance nitrification, denitrification, and organic waste degradation in both marine and freshwater aquaria and limits the availability of pre-existing phosphate
- ENHANCED WATER QUALITY – The bacteria supplement promotes a clean and healthy environment by educing concentrations of organic carbon, ammonia, nitrite, nitrate, phosphate and hydrogen sulfide production in all marine and freshwater ecosystems
- DIRECTIONS – Shake well before use. Mix MicroBacter7 with 250 ml of aquarium water in a clean container before adding it to the aquarium. If using a pipette below water level, clean it with fresh water before placing it back into the MicroBacter7 bottle
- AMERICAN-MADE EXCELLENCE – Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed products. Made in the USA, we deliver superior quality solutions to elevate the vibrancy and health of your aquarium

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DBC0GD4 |
| ASIN  | B01DBC0GD4 |
| Allergen Information | Sulphites Free |
| Best Sellers Rank | #4,292 in Pet Supplies ( See Top 100 in Pet Supplies ) #77 in Aquarium Filter Accessories |
| Brand Name | Brightwell Aquatics |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,429) |
| Date First Available  | March 23, 2016 |
| Global Trade Identification Number | 00810086014996 |
| Included Components | MicroBacter7 |
| Is Discontinued By Manufacturer  | No |
| Item Form | Liquid |
| Item Type Name | Aquarium Bacteria |
| Item Weight | 0.32 Pounds |
| Item model number  | BAC125 |
| Liquid Volume | 125 Milliliters |
| Manufacturer | Brightwell Aquatics |
| Manufacturer  | Brightwell Aquatics |
| Manufacturer Part Number | BAC125 |
| Model Number | BAC125 |
| Product Dimensions  | 5.13 x 1.63 x 1.63 inches; 5.12 ounces |
| Target Species | Fish |
| UPC | 810086014996 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Brightwell Aquatics
- **Item Form:** Liquid
- **Item Weight:** 0.32 Pounds
- **Liquid Volume:** 125 Milliliters
- **Manufacturer:** Brightwell Aquatics

## Images

![MicroBacter7 Complete Bioculture for Fish Tank or Aquarium - Populates Biological Filter Media for Saltwater and Freshwater Fish - Aquarium Water Treatments, 4.2 fl oz - Image 1](https://m.media-amazon.com/images/I/61Y6Osw85XL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can we add this to an existing reef with slightly elevated ammonia?**
A: If by existing you mean live stock in it? Yes, and if you mean no stock but ammonia, yes again.  You might be better off doing a water change if you have life in tank though. If you dose this you will have to monitor nitrite and nitrate cycles.

**Q: Im new...will this kill off my invert food sources or hurt them in any way?**
A: It will not kill your invert food source. It’s bacteria that’s beneficial to your aquarium

**Q: Noob question how much of this do I use on a 32 gallon biocube? It’s a new tank I can’t find any measuring cups for ML anywhere n my town**
A: Once your tank has been fed regularly for a few days either with out without fish to start the bacterial cycle, add half during the first week and the other half during the 2nd.

Add a small amount after water changes is also a good idea for upkeep. Buy 2 bottles.

**Q: how long did it take for this product to bring down nitrite levels?**
A: I wouldn't use this product as a means of nitrite reduction. Live rock will do a much better job of that. I use this product as a means of adding biodiversity to my tank. It did nothing for nitrate levels.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as intended - 0 nitrates
*by T***R on January 3, 2026*

This stuff works as intended. I will be honest, I thought this was a type of bacteria to boost bacteria biodiversity, and technically it is but it is mostly an enzyme to tackle nitrates in your tank. Ever since I've dosed this my tank has stayed at 0-.1 nitrates which can be good at times. But some nitrate can help foster coral growth. And ever since I've dosed this, my corals haven't grown as fast as they used to. So I would say this product is great for when your tank has been established and you want to "freeze" your tanks growth. But for new tanks I would stay away for awhile and instead buy brightwell clean which has the bacteria to broaden your bacteria biodiversity. The enzymes in this product eat at the nitrates and turn it into nitrogen gas which completely eliminates nitrates so if you want some nitrates, use this product with caution. But if i had done my research and used this product as intended, it did exactly what it was meant for.

### ⭐⭐⭐⭐⭐ Saved my fish
*by H***I on March 4, 2026*

Excellent product. Thank you so much 🙏

### ⭐⭐⭐⭐⭐ Good product
*by K***E on March 1, 2026*

This is helpful for keeping water clean and fish healthy.

## Frequently Bought Together

- Brightwell Aquatics MicroBacter7 Complete Bioculture for Fish Tank or Aquarium - Populates Biological Filter Media for Saltwater and Freshwater Fish - Aquarium Water Treatments, 4.2 fl oz
- Instant Ocean Sea Salt 50 Gallons, For Marine Aquariums, Fast Dissolving
- Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

---

## 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.us/products/36788255-microbacter7-complete-bioculture-for-fish-tank-or-aquarium-populates-biological](https://www.desertcart.us/products/36788255-microbacter7-complete-bioculture-for-fish-tank-or-aquarium-populates-biological)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-23*