Aquarium Bacteria

Aquarium Bacteria
Product No. ML90664
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  • Dual-usage bacterial blend includes nitrifying bacteria as well as a proprietary mix of bacillus bacteria to boost bio-filtration while also reducing sludge caused by decaying organic waste
  • Instantly starts and cycles newly set-up tanks when used at a more concentrated dose
  • Recommended monthly usage for established aquariums to replenish nitrifiers and heterotrophic cleaner bacteria lost during partial water changes
  • Packaged in stand-up pouch bags with reclosable pour spout
  • Monthly maintenance dosing: two teaspoons (10 mL) per 10 gallons of aquarium water
  • New aquarium start-up dosing (with recommended livestock stocking): 4 fl oz for every 20 gallons of water

Can I use this for saltwater aquariums?

Asked by: Imprasert86
Yes, you could, but it is meant for freshwater, and does not contain the one additional bacteria that saltwater happens to have, so we recommend instead. BREX
Answered by: BREX
Date published: 2018-09-24

How soon after dosing a 20 gal tank can you perform a water change? 

Asked by: LoriB00
That depends on how established the tank is, but typically wait at least one week. Two weeks if the tank is new. BREX
Answered by: BREX
Date published: 2018-09-24

Hi. I just added 4oz of aquarium bacteria to my tank during a water change and when I poured it out it was white/cloudy. I have 4 Guppies and a Plecco! Are they safe? Or should I do another water change?

Asked by: K8EB
They are fine. It is normal for it to appear somewhat white or cloudy as it goes into the tank, but you may not have mixed it enough which made it appear alarming. Your fish should be fine. BREX
Answered by: BREX
Date published: 2018-08-21

Hello, i just got a new 20 gallon tank i set up n put 3 fish in it. Its been 2 days then i bought this pouch 4oz put the hole pouch. I have 13 fish total in a 10 gallon tank that i want to transfer to new 20 gallon tank. Can i transfer them all now?

Asked by: Hugo Ramirez
Thank you for your question Hugo! No, not yet, most likely. First, you need to test the water for ammonia, nitrite, and nitrate to see where the new tank is in relation to the cycle. Even if it is completely cycled though, adding 13 fish all at once will cause a huge spike in ammonia so try to break them up into groups of 3 or 4, and add more bacteria with each addition of fish. A 20 gallon can comfortably house 10 fish of 2" each. BREX
Answered by: BREX
Date published: 2018-08-13

Hi, I am setting up a new 10 gallon tank. I have treated the tap water but have not yet added this bacteria that I bought. Do I add fish before or after adding the bacteria? How long before or after should I wait? Thanks for your help! Amanda

Asked by: Mandyk
Hi Amanda, Add one fish, and while the fish is floating in a bag from the store, pour the bacteria into the tank after mixing it well. BREX
Answered by: BREX
Date published: 2018-08-07

Hi friends! I'm looking to do a fishless cycle so my tank is good to go before I add fish. Would this product be okay to use, or do I need to have live fish for it to be effective?

Asked by: SlickBrew9225
You would need live fish for it to work properly as bacteria need a constant source of food. It is much, much simpler and faster to just add 1" of fish for every 10 gallons of water, along with this, than it is to do a fishless cycle. You would safely cycle the tank in about two weeks, whereas fishless cycling often takes months, per customer feedback. BREX
Answered by: BREX
Date published: 2018-06-27

I purchased a 4 oz bag of the aquarium bacteria and have a 3.5 gallon tank. How much should I put? Is the whole 4 oz safe?

Asked by: celestars1
It won't harm anything but you don't need that much. The pouch treats up to 20 gallons of water. We would recommend approximately one quarter of the pouch. BREX
Answered by: BREX
Date published: 2018-06-21

I put an entire 4 oz pack in my 5 gallon tank. Will this be a problem?

Asked by: Tstall
No. It will cloud the water for a bit, but eventually clear. It's just bacteria and will not harm anything. BREX
Answered by: BREX
Date published: 2018-06-11
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ML90664 - 4 fl oz
ML90665 - 8 fl oz