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 125ml

Product ID: 121214898

Details

Brand
Brightwell
Item form
Liquid
Item weight
0.32 Pounds
Liquid volume
125
Unit count
1 count

🌿Boosts photosynthetic nutrient cycle

🧬Complex aerobic & anaerobic microbes

⚗️125ml potent liquid formula

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AED 132

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Description

🌊 Elevate your aquarium’s ecosystem with microbial mastery!

MICROBIAL POWERHOUSE - Advanced blend of aerobic & anaerobic microbes accelerates biological filtration
OXYGEN BOOST FORMULA - Increases dissolved oxygen, promoting vibrant aquatic life
ORGANIC WASTE ERADICATOR - Efficiently digests uneaten food, excreta & detritus to keep substrate pristine
TURBOCHARGE AQUARIUM HEALTH - Rapidly reduces ammonia, nitrite, nitrate & phosphate for crystal-clear water
ECO FRIENDLY NUTRIENT RECYCLING - Transforms organic compounds into nutrients that fuel healthy plant growth

Brightwell Aquatics MicroBacter7 is a scientifically formulated liquid microbial blend designed to establish and enhance biological filtration in both marine and freshwater aquariums. It rapidly reduces harmful compounds like ammonia and phosphate, digests organic waste, boosts oxygen levels, and recycles nutrients to support healthy fish and plants, ensuring a cleaner, healthier aquatic environment.

Specifications

ASIN	B01DBC0GD4
Best Sellers Rank	23,967 in Pet Supplies ( See Top 100 in Pet Supplies ) 277 in Aquarium Water Treatments
Brand Name	Brightwell Aquatics
Country Of Origin	USA
Customer Reviews	4.6 4.6 out of 5 stars (559)
Global Trade Identification Number	00810086014996
Item Form	Liquid
Item Weight	0.32 Pounds
Liquid Volume	125 Millilitres
Manufacturer	Brightwell
Manufacturer Part Number	BAC125
Model Number	BAC125
Target Species	Fish and Plants
UPC	810086014996
Unit Count	1 count

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