Tropic Marin


Grouped product items
500 mL NP-Bacto-Balance

SKU: 212885

In stock


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1000 mL NP-Bacto-Balance

SKU: 212886

In stock


- +

NP-Bacto-Balance is ideal for keeping nitrate and phosphate low while maintaining the important balance between these key nutrients.


In many situations, some reef aquariums may develop an excess of nitrate or phosphate while being limited in the other. When this occurs, bacteria and other organisms can't properly metabolize the excess nutrients, and carbon dosing alone is not enough.


In order to restore the proper ratio of carbon, nitrogen, and phosphorus in these aquariums, it may be necessary to provide additional elements along with the carbon source. NP-Bacto-Balance is a unique solution that can help to stabilize nitrates and phosphates at the lowest possible levels while avoiding a nutrient deficiency. With its balanced composition of carefully selected organic and inorganic nutrients, NP-Bacto-Balance acts to reduce nitrate and phosphate while improving coloration and growth of corals, sponges and other filter feeders.


Key Benefits

  • Efficient reduction of nitrate and phosphate
  • Increased skimmer efficiency
  • Maintains optimal ratio of carbon, nitrogen, and phosphorus
  • Bacterial biomass acts as nutrient source for filter feeders
  • Prevents situations of nutrient deficiency
  • Improves the coloration and growth of corals and other inverts
  • Suitable for aquariums of all ages
  • Mature tanks can be significantly revived
  • Dose manually or with a dosing pump


Available in Three Sizes

  • 200 mL
  • 500 mL
  • 1,000 mL


Dosing Recommendations - Dosing depends on the age of the aquarium

  • In the case of new and young tanks (0-1 years old*) no more than 0.25 ml per 100 l /25 US-Gal. tank content should be added per day.
  • In tanks of a medium age (1-2 years old*) up to 0.5 ml per 100 l /25 US-Gal. can be dosed per day
  • In mature tanks (>2 years old*) can receive from 0.5 to 1 ml for 100 l /25 US-Gal. aquarium water per day.
  • For best results, add Tropic Marin NP-Bacto-Balance to a high water flow area in the tank at the beginning of the lighting cycle.
  • Dosage may be adjusted every 2 weeks by .25 mL per 100 liters/25 US-Gal, after testing nitrate and phosphate

Maximum Dose - A dosage of 1 ml per 100 l /25 US-Gal. tank content per day should not be exceeded under any circumstances. If a clouding of the tank is observed after the elevation of the dosage of NP-BACTO-BALANCE, the dosage should be reduced to the previous level.


Beside the organic and inorganic nutrients, NP-Bacto-Balance also contains the same trace elements of Tropic Marin K+ Elements in the same concentration. Up to a dosage of 0.75 mL NP-Bacto-Balance per 25 gallons per day a further supplement with 1 ml/25g K+ Elements can have a positive effect on the coloration of the corals. We recommend additionally the Tropic Marin® A- Elements for a complete trace elements dosage to add missing trace elements such as iodine, bromine, fluorine, vanadium, molybdenum and selenium.


Note - Dosages are approximate guides. In individual cases, the measurement depends on the stability of the tank.



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Product Questions

Is it acceptable to mix this in with auto topoff water? Say I use 15 liters in 10 days, I could do 10x0.25ml for a total of 2.5 ml. Thanks.
Question by: Justin P on Nov 27, 2023, 6:07 PM
Hey there,
Thank you for reaching out to us. I personally would not trust ant ATO with dosing of any products. To many obvious problems. Stick to the part dowsers to do that. Please let me know if you need anything further.
Answer by: Thomas Wofle (BRS Staff) on Feb 1, 2024, 1:15 PM
Which of these products would be best for an 8 year old 280 gallon mixed reef that. has low nitrates (zero with Hanna checker) and high phosphates (1.2 with Hanna checker)?
Question by: Clint Warren on Nov 25, 2023, 7:21 PM
We would recommend using Elimi-NP to decrease your phosphates. Once you have lowered your phosphates to between 0.03 and 0.1 ppm, you will want to switch to NP-Bacto-Balance.
Answer by: Laura (BRS Staff) on Feb 6, 2024, 10:21 AM
Hello, do I need to run a skimmer using this product? I am also currently dosing the all for reef..okay to use both together?
Phosphate .15 nitrates 5
Question by: Martin Sands on Feb 14, 2023, 9:04 PM
While it is recommended to use a skimmer, it isn't strictly necessary. If you are attempting to reduce phosphate I recommend Elimi-NP instead as it will more directly eliminate phosphates. https://www.bulkreefsupply.com/elimi-np-tropic-marin.html

Both NP-Bacto-Balance and Elimi-NP are safe to use with All-For-Reef!
Answer by: William Reed (BRS Staff) on Mar 23, 2023, 8:21 AM
Whoops, sorry about the last question. I read it as .25mL per 100 gal not .25mL per 25 gallons!
Question by: Jacob Hively on Jul 5, 2022, 8:52 PM
Thanks for the question! For a 10 gallon tank per the instructions, you'd want to start off with a dosage of 0.1mL per day. Unforutnately, I'm not quite sure how much fluid is dispensed per pump or drop, but testing it with a graduated cylinder can help to ensure you don't over dose. Keep in mind to back off on dosing if you notice cloudiness in the tank. Let us know if we can help with anything else!
Answer by: Kyle Thomas (BRS Staff) on Jul 8, 2022, 2:10 PM
Where can I find the trace elements that are in NP-Bacto Balance? noticed it mentioned "Beside the organic and inorganic nutrients, NP-Bacto-Balance also contains the same trace elements of Tropic Marin K+ Elements in the same concentration."
Question by: Eric on Jun 30, 2022, 12:22 PM
Answer by: James Johnson (BRS Staff) on Jun 30, 2022, 4:23 PM
Since this product won’t bottom out nutrient levels, how do you determine if you should increase or decrease dosage?
Question by: Jack on Apr 16, 2022, 11:27 PM
Hey there,
Thank you for reaching out to us. You will want to test to verify if your levels are where you want them.
Answer by: Matt Lucero (BRS Staff) on Apr 21, 2022, 9:11 AM
With this having the K+ elements in it, do I need to stop kalkwasser or lower my dose when using this?
Question by: Anthony Koprowski on Mar 10, 2020, 12:12 AM
Hi there,

This does not contain an alkalinity or calcium component so you would need to maintain your kalkwasser.

Take care
Answer by: Thomas Billington on Mar 11, 2020, 2:42 PM