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 KUWAIT

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Description

🧬 Elevate your aquarium’s ecosystem with microbial magic!

MICROBIAL MASTERY - Harnesses 7 advanced aerobic & anaerobic microbes for superior filtration.
CRYSTAL CLEAR CLARITY - Rapidly reduces ammonia, nitrite, nitrate & phosphate for pristine water.
WASTE BREAKDOWN POWER - Accelerates organic waste degradation to keep your tank fresh and vibrant.
DUAL ECOSYSTEM SUPPORT - Optimized for both freshwater & marine aquariums—versatility unlocked.
TRUSTED SCIENCE BACKED - Veterinarian pathologist tested formula ensures reliable, safe aquatic care.

Brightwell Aquatics MicroBacter7 is a scientifically formulated liquid bacterial supplement featuring a complex blend of aerobic and anaerobic microbes designed to enhance biological filtration, nutrient cycling, and water clarity in both freshwater and marine aquariums. Made in the USA and veterinarian tested, it accelerates nitrification and denitrification processes while reducing harmful compounds like ammonia and hydrogen sulfide, ensuring a healthier, cleaner aquatic environment.

Specifications

ASIN	B01DBC0GD4
ASIN	B01DBC0GD4
Allergen Information	Sulphites Free
Best Sellers Rank	#7,760 in Pet Supplies ( See Top 100 in Pet Supplies ) #148 in Aquarium Filter Accessories
Brand Name	Brightwell Aquatics
Customer Reviews	4.7 4.7 out of 5 stars (3,474)
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	5.12 ounces
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

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