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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MicroBacter7 Biological Filter Bioculture Aid, 4L

Product ID: 201406281

Details

Brand
Brightwell
Item Form
Liquid
Item Weight
7.7 pounds
Liquid Volume
4 liters
Unit Count
1 Count

💧Rapid water quality enhancement

🧬Advanced microbial formula

🇺🇸Proudly American-made

NZ$414

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Description

🌊 Elevate your aquarium’s ecosystem with science-backed clarity and care!

MICROBIAL MASTERY - Harness a complex blend of aerobic & anaerobic microbes for unbeatable biological filtration.
DUAL ECOSYSTEM POWER - Optimized for both freshwater and marine aquariums—versatility that fits your aquatic lifestyle.
VET APPROVED VITALITY - Formulated and tested by veterinarian pathologists to ensure safe, effective aquatic care.
CRYSTAL CLEAR CONFIDENCE - Rapidly reduces ammonia, nitrite, nitrate, phosphate & organic carbon for pristine water clarity.
MADE IN THE USA TRUSTED WORLDWIDE - Support American innovation with a premium product that elevates your aquarium’s health.

Brightwell Aquatics MicroBacter7 is a 4L liquid bioculture aid featuring a scientifically advanced microbial formula that accelerates nitrification, denitrification, and organic waste breakdown. Designed for both freshwater and marine tanks, it rapidly reduces harmful compounds like ammonia and phosphate, improving water clarity and substrate health. Made in the USA and veterinarian-tested, it’s the trusted choice for professional-grade aquarium filtration and water conditioning.

Specifications

ASIN	B0849W1V96
Allergen Information	Sulphites Free
Best Sellers Rank	#5,899 in Pet Supplies ( See Top 100 in Pet Supplies ) #152 in Aquarium Filter Accessories
Brand	Brightwell Aquatics
Brand Name	Brightwell Aquatics
Customer Reviews	4.7 out of 5 stars 3,506 Reviews
Included Components	MicroBacter7
Item Form	Liquid
Item Type Name	Aquarium Bacteria
Item Weight	7.7 pounds
Liquid Volume	4 liters
Manufacturer	Brightwell Aquatics
Manufacturer Part Number	BAC4L
Model Number	BAC4L
Pet Type	Fish
Target Species	Fish
UPC	810086017782
Unit Count	1 Count

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NZ$414

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered 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 New Zealand.

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