Can we add this to an existing reef with slightly elevated ammonia?

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.

Im new...will this kill off my invert food sources or hurt them in any way?

It will not kill your invert food source. It’s bacteria that’s beneficial to your aquarium

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

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.

how long did it take for this product to bring down nitrite levels?

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.

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Brightwell Aquatics MicroBacter7 Complete Bioculture for Fish Tank or Aquarium - Populates Biological Filter Media for Saltwater and Freshwater Fish - Aquarium Water Treatments, 67.6 fl oz

Product ID: 57104239

Details

Brand
Brightwell
Item form
Liquid
Item weight
454 g
Liquid volume
2 Litres
Manufacturer
TopDawg Pet

💧2L liquid volume

🦠7-strain microbial blend

🇺🇸Made in USA quality

40620 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🦠 Elevate your aquarium’s ecosystem with microbial magic!

NUTRIENT MASTERY - Accelerates nitrification & denitrification, slashing ammonia, nitrite & phosphate levels.
MICROBIAL POWERHOUSE - Advanced aerobic & anaerobic bacteria boost filtration and water clarity fast.
DUAL ECOSYSTEM SUPPORT - Optimized for both saltwater and freshwater tanks—versatility that fits your lifestyle.
CLEANER HEALTHIER WATER - Rapidly reduces organic waste and hydrogen sulfide for a vibrant aquatic environment.
TRUSTED AMERICAN CRAFTSMANSHIP - Scientifically backed, vet-recommended formula made with pride in the USA.

Brightwell Aquatics MicroBacter7 is a 2-liter advanced bioculture liquid designed to establish and enhance biological filtration in both freshwater and saltwater aquariums. Featuring a complex blend of aerobic and anaerobic microbes plus natural enzymes, it accelerates nutrient cycling by reducing ammonia, nitrite, nitrate, phosphate, and hydrogen sulfide, resulting in clearer, healthier water. Made in the USA and vet-recommended, it’s the go-to solution for aquarium enthusiasts seeking superior water quality and ecosystem balance.

Specifications

ASIN	B00412Z28S
Allergen Information	Sulphites Free
Best Sellers Rank	81,845 in Pet Supplies ( See Top 100 in Pet Supplies ) 821 in Aquarium Water Treatments
Brand	Brightwell Aquatics
Brand Name	Brightwell Aquatics
Country Of Origin	United Kingdom
Customer Reviews	4.7 out of 5 stars 358 Reviews
Global Trade Identification Number	00810086012213
Included Components	MicroBacter7
Item Form	Liquid
Item Type Name	Aquarium Bacteria
Item Weight	1 Pounds
Item form	Liquid
Item weight	1 Pounds
Liquid Volume	2 Litres
Liquid volume	2 Litres
Manufacturer	TopDawg Pet Supply
Manufacturer Part Number	BAC2L
Model Number	BAC2L
Pet Type	Fish
Target Species	Fish
UPC	810086012213
Unit Count	1 count
Unit count	1 count

Reviews

A**J

Good bacteria supplement !!!

I have used it for bring my nitrifying bacteria population and it did what I have expected. I strongly recommend it and will keep on buying this product.

1.09.2017

D**.

Good bacteria liquid

Bottle is filled to the brink but difficult to pour and kinda easily spills. Price is reasonable and bacteria is good to maintain my tank.

7.01.2024

V**L

Excellent product

I was facing diatom issue for months, I try many things to reduce diatom, at last some one told me try microbacter7, my tank 120 gallon reef tank mixed. The result was not quick but after 2 week unbelievable tanks looks so clean sand bed, rock, water it’s a miracle, inside daily 20 ml. From last month I am dosing 20 ml every day.

6.11.2023

K**G

Good

17.07.2021

I**A

Is very good product 👌

Recommended, I used this product each month one time. Good price.

12.02.2024

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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40620 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews