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.

Microbacter7 | Desertcart Guernsey

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Description

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

MICROBIAL MASTERY - Harness a scientifically engineered blend of aerobic & anaerobic microbes for unbeatable biological filtration.
RAPID STABILIZATION - Fast-track your aquarium’s nitrogen cycle and organic waste breakdown for a thriving aquatic environment.
DUAL ECOSYSTEM SUPPORT - Optimized for both freshwater and marine tanks, ensuring versatile aquatic care.
CRYSTAL CLEAR CONFIDENCE - Experience visibly cleaner, healthier aquarium water by reducing ammonia, nitrites, nitrates, and phosphates.
MADE IN THE USA TRUSTED WORLDWIDE - Backed by veterinary pathologists and crafted with premium quality standards for peace of mind.

Brightwell Aquatics MicroBacter7 is a 125 ml liquid bioculture aid featuring a complex, non-pathogenic microbial formula designed to accelerate nitrification, denitrification, and organic waste degradation in both freshwater and marine aquariums. It reduces harmful compounds like ammonia, nitrites, nitrates, phosphates, and hydrogen sulfide, promoting superior water clarity and a stable aquatic environment. Made in the USA and veterinarian pathologist tested, it’s ideal for established tanks seeking enhanced biological filtration and water quality.

Specifications

ASIN	B01DBC0GD4
ASIN	B01DBC0GD4
Allergen Information	Sulphites Free
Best Sellers Rank	#6,163 in Pet Supplies ( See Top 100 in Pet Supplies ) #191 in Aquarium Filter Accessories
Brand Name	Brightwell Aquatics
Customer Reviews	4.7 4.7 out of 5 stars (3,498)
Date First Available	March 23, 2016
Global Trade Identification Number	00810086014996
Included Components	MicroBacter7
Item Form	Liquid
Item Type Name	Aquarium Bacteria
Item Weight	5.12 ounces
Item model number	BAC125
Liquid Volume	125 ml
Manufacturer	Brightwell Aquatics
Manufacturer	Brightwell Aquatics
Manufacturer Part Number	BAC125
Model Number	BAC125
Number of Items	1
Pet Type	Fish
Product Dimensions	5.13 x 1.63 x 1.63 inches; 5.12 ounces
Target Species	Fish
UPC	810086014996
Unit Count	1 Count

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