Seachem Equilibrium 300g (SC-446)

New product

  • Restores mineral and GH of water
  • Promotes healthy growth of plants
  • Ideal for planted aquarium

More details

$ 13.95

In Stock

- +

Brand: Seachem

More info

Seachem Equilibrium 300g (SC-446)

Seachem Equilibrium swiftly restores and maintains the mineral balance and GH of water. If your aquarium plants are not thriving, it may be that the water is deficient in key minerals, and adding Seachem Equilibrium can help to promote healthy plant growth.

Seachem Equilibrium does not contain sodium or chloride (which can be detrimental to a planted aquarium at elevated levels).

Seachem Equilibrium is ideally suited for use with RO (reverse osmosis) or DI (deionized) water or any mineral deficient water.

Seachem Equilibrium raises the essential mineral/electrolyte content (General Hardness) of the water to balance with and promote stability of the carbonate hardness. To maintain KH, we recommend Alkaline Buffer.

Seachem Equilibrium contains only calcium, magnesium, and potassium salts, which aid in fish metabolism, but are also highly beneficial to plant growth.


To raise mineral content/general hardness (GH) by 1 meq/L (3dH), add 16g (1 tablespoon) for every 80 L (20 US gallons) when setting up an aquarium or when making water changes (add to new water).

For optimum solubility we recommend mixing with 1 L (1 qt.) of water (the resulting mixture will have a white opaque appearance). When this mixture is added to the aquarium it will impart a slight haze that should clear within 1530 minutes. HINTS: Do not use Equilibrium when replacing evaporated water. This dose is based on DI or RO water; for other water, measure hardness (GH) first, then add according to need. For precise dosing, use the Seachem Digital Spoon Scale.

Plant preferences vary, but a general guide is about 12meq/L (36 dH) or match the existing or target carbonate hardness (KH), which, ideally, is also about 12meq/L (36 dKH).

Equilibrium will compact with age, but remains effective.


Does Equilibrium introduce any chlorides or sulfates into the water? If so, at what concentration per molar weight?

A: It does not introduce any chlorides. The balance from the Guaranteed Analysis is from sulfate and water of hydration. I cannot go into any more detail without giving you the exact formula but that should give you a good approximation of what you need (i.e. knowing the rough percentage and the MW of sulfate you should get whatever number you are looking for).

Is there a liquid equivalent to Equilibrium?

A: As of now, there is no liquid version of Equilibrium, but you may want to try Replenish as an alternative.

Does Equilibrium contain phosphates or anything else that might cause algae blooms?

A: Equilibrium is a supplement designed to create or build general hardness (GH) due to its mineral content (calcium, magnesium, potassium, etc.). It does not contain any nitrogenous pollutants (ammonia, nitrite, or nitrate) and does not contain any phosphate.


Amounts per 1 g:

  • Soluble Potash (K2O) 23.0%
  • Calcium (Ca) 8.06%
  • Magnesium (Mg) 2.41%
  • Iron (Fe) 0.11%
  • Manganese (Mn) 0.06%

Derived from: potassium sulfate, calcium sulfate, magnesium sulfate, ferric sulfate, manganese sulfate.

Elemental potassium is present at a concentration of 195,000 ppm (19.5%). Fertilizer laws require us to list potassium in terms of equivalence to a material that is not present (K2O) rather than the more scientifically sound method of simple elemental equivalence.

Seachem Online Shop

N30 is the authorised dealer in Singapore for Seachem aquarium products (water conditioners, supplements, medications, water testing kits, etc).

Order your Seachem aquarium products online today at

Seachem Guide

Which Seachem products do I need?

From treating fish infections to solving water and algae problems, Seachem has the right products to restore your aquarium.

Seachem - Fish Disease Treatment

A sick fish can spread infection quickly within an aquarium and threaten the life of other aquatic inhabitants. It is critical to accurately diagnose fish disease and dose the right medications as early as possible.

common fish diseases symptom guide - seachem medication guide

Seachem - Solve Aquarium Problems

Sometimes, a small change in water chemistry, alkalinity and acidity could cause problem for the aquarium. Below are some of the common problems:

  • Cloudy water
  • Algae over growing
  • Ammonia, nitrite, nitrate toxicity
  • Detritus or slime

Is your aquarium facing any of the above issues? If yes, use this guide to find the right Seachem products to restore your aquarium.

seachem products for common aquarium problems

About N30

N30 Tank Pte. Ltd. is a leading manufacturer of custom-made fish tanks cabinets. As a tank maker, we supply aquarium cabinets to homes and offices locally as well as ship orders worldwide.

N30 provides expertise in the construction of large acrylic aquariums, such as those in Underwater World (Resort World Sentosa). We supply customised storage tanks to fish farms such as Qian Hu, and to major restaurants. The N30 brand name is trusted for quality workmanship in the industry.

N30 has developed unique glass-sealing techniques, which allows us to produce very large tanks (such as 30-feet long) without issue of water leakage. For all custom-made fish tanks, N30 assures customers of Five Years Warranty against water leakage.

To support the needs of aquarium hobbyists, N30 is also offering a wide range of aquarium accessories such as filters, pumps, lighting, wave makers, skimmers... for sale online. We encourage customers to browse and shop online at for accessories. It is convenient and we provide free delivery for orders (see the online store terms and conditions for details).

Loyalty Points

N30 Member Rewards

Earn 5 points per dollar

N30 members earn five points per dollar spent online at Each point is worth S$0.01 in cash value.

Convert points into eVouchers redeemable for discounts on your orders.

shopearn pointsredeem

When you purchase S$100 of aquarium accessories online at, you will earn 500 points in your N30 account. You may convert the 500 points into an eVoucher worth S$5. To use this eVoucher on your next order, simply enter the unique eVoucher code in your shopping cart before you check out. That's all!

The more you shop on, the more you will save on your next order!

30 other products in the same category:

Customers who bought this product also bought:

QR code