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 - Bacteria & Water Conditioner for Fish Tank or Aquarium, Populates Biological Filter Media for Saltwater and Freshwater Fish

Brightwell Aquatics MicroBacter7 - Bacteria & Water Conditioner for Fish Tank or Aquarium, Populates Biological Filter Media for Saltwater and Freshwater Fish

Product ID: 336262166

Details

Brand
Brightwell
Item form
Liquid
Item weight
7.65 Pounds
Liquid volume
4 Liters
Unit count
1 Count

💧4L liquid for large tanks

🦠7+ aerobic & anaerobic microbes

🇺🇸Made in USA, premium quality

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฿17018

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Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧪 Elevate your aquarium’s ecosystem with science-backed clarity!

MICROBIAL POWERHOUSE - Advanced aerobic & anaerobic bacteria boost filtration and water clarity fast.
CLEANER CLEARER WATER - Rapidly reduces hydrogen sulfide and organic carbon for a pristine, healthy aquatic environment.
DUAL ECOSYSTEM SUPPORT - Perfectly formulated for both freshwater and saltwater aquariums—versatility that fits your lifestyle.
ORGANIC WASTE BREAKDOWN - Accelerates nitrification & denitrification to keep ammonia, nitrite, nitrate, and phosphate levels in check.
TRUSTED AMERICAN CRAFTSMANSHIP - Scientifically backed, veterinarian recommended, and proudly made in the USA for unmatched reliability.

Brightwell Aquatics MicroBacter7 is a 4-liter liquid bacterial supplement featuring a complex blend of aerobic and anaerobic microbes designed to enhance biological filtration in both freshwater and saltwater aquariums. It accelerates nutrient cycling by promoting nitrification and denitrification, reduces harmful compounds like ammonia and hydrogen sulfide, and improves overall water quality. Made in the USA and veterinarian recommended, it’s a trusted solution for maintaining a vibrant, healthy aquatic environment.

Specifications

ASIN	B0849W1V96
Allergen Information	Sulphites Free
Best Sellers Rank	#11,057 in Pet Supplies ( See Top 100 in Pet Supplies ) #72 in Fish Medication & Health Supplies
Brand Name	Brightwell Aquatics
Customer Reviews	4.7 4.7 out of 5 stars (3,352)
Included Components	MicroBacter7
Item Form	Liquid
Item Type Name	Aquarium Bacteria
Item Weight	7.65 Pounds
Liquid Volume	4 Liters
Manufacturer	Brightwell Aquatics
Manufacturer Part Number	BAC4L
Model Number	BAC4L
Target Species	Fish
UPC	810086017782
Unit Count	1 Count

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