SKU: 26076593111

Seachem Replenish

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Description

Seachem ReplenishSeachem Replenish Seachem Replenish is used to restore and maintain General Hardness (GH) in aquariums by replenishing necessary minerals removed by reverse osmosis or deionizing filtration. Restore and maintain GH Replenishes necessary minerals removed by RO DI Necessary to prevent osmotic stress and osmotic shock Replenish is a proprietary blend of salts designed to replenish physiologically relevant minerals that are removed by reverse osmosis or

Seachem Replenish

Seachem Replenish is used to restore and maintain General Hardness (GH) in aquariums by replenishing necessary minerals removed by reverse osmosis or deionizing filtration.

  • Restore and maintain GH
  • Replenishes necessary minerals removed by RO/DI
  • Necessary to prevent osmotic stress and osmotic shock

Replenish™ is a proprietary blend of salts designed to replenish physiologically relevant minerals that are removed by reverse osmosis or deionizing filtration. Replenish™ restores General Hardness (GH) using a balanced blend of both “soft” (sodium, potassium) and “hard” (calcium, magnesium) salts. Restoration of mineral content is essential since a complete lack of minerals will result in osmotic stress in those species whose osmoregulation systems are adapted to a mineralized environment. Severe osmotic stress can result in osmotic shock which will lead to rapid death.

To restore GH in the planted aquarium, we recommend Seachem Equilibrium™.

DIRECTIONS

Add 5 mL (1 capful) Replenish™ to 40 L (10 US gallons) to raise GH by 1 meq/L (2.8 dGH). Recommended restoration level into DI or RO water is 1-2 meq/L which is 5 mL per each 20-40 L (5-10 US gallons.)

GH RATING GUIDE (MEQ/L)

0-1: Soft
1-2: Moderately Soft
2-3: Slightly Hard
3-4: Moderately Hard
4-6: Hard
6+: Very Hard

INGREDIENTS

calcium chloride, magnesium chloride, sodium chloride, potassium chloride

GUARANTEED ANALYSIS (PER 1 G)

Calcium (min): 13.00%
Calcium (max): 14.00%
Magnesium (Min): 1.20%
Potassium (Min): 0.12%
Sodium (Min): 0.60%
Sodium (Max): 0.70%

OSMOTIC STRESS AND RESTORATION OF GH

Osmotic stress and shock occurs when fish are kept in water with inadequate mineral levels (too high or too low). Osmotic stress affects more seriously fish whose natural habitat is rich in minerals and who are kept in an aquarium with a low mineral level, as osmotic gradients (difference) between the internal fluids of the fish and its surrounding environment (water) increase. Such fish have a less effective osmoregulation than those who are physiologically adapted to water with a low mineral level. That is why they are not able to cope with overloading of osmoregulation.

Osmotic shock can be a result of a breakdown in osmoregulation due to inappropriate chemical composition of the water. It can also be caused by increased permeability of the skin resulting from a disease or trauma. Osmoregulation enables fish to maintain the proper balance of salt and water in the body, which is necessary to create optimal conditions for various physiological and biochemical processes. In all fish species osmoregulation developed in a way that enabled them to maintain the proper balance of salt and water in the water with chemical composition found in their natural habitat. If osmoregulation is disturbed due to adverse conditions (osmotic stress) or a sudden change in the chemical composition of water (osmotic shock), fish might not be able to physiologically cope with it. Chronic osmotic stress can eventually result in fish’s death and osmotic shock can cause death very quickly.

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Exchange/Return Notes
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SKU: 26076593111

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customer
Cuba, US
★★★★★ 4
Good pillows; wear a mask when fluffing and airing out
Color: Memory Pillow, Size: Standard
Searched everywhere for comfortable pillows, finally found this set. Perfect density and firmness, very comfortable. Downside is that they were covered in some type of white powder which dispersed as I was fluffing them up. Fiberglass, maybe? I recommend customers fluff and air them outside before use, and wear a mask. Pillows had an industrial smell, which dissipated after 20 minutes in the fresh air.
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Reviewed in the United States on April 8, 2025
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Christie Caviness
Natrona Heights, US
★★★★★ 5
Great pillows
Color: Black(4pack), Size: Standard
These are absolutely great and them being cooling pillows is a big plus for someone who has hot flashes at night. They are very comfortable and they are great support for any position sleeper. These pillows are durable and the material comfortable and soft.
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Reviewed in the United States on March 29, 2026
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Grace Phelps
Massapequa, US
★★★★★ 5
Soft pillows
Color: Grey, Size: Standard
Good size pillows. Very comfortable. Soft pillow and not so hard to lay on. It’s not too bulky or too big.
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Reviewed in the United States on May 15, 2026
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Andrew
Carnegie, US
★★★★★ 3
They are using different/cheaper shredded foam then they were 1 year ago
Color: Memory Pillow, Size: Standard, Color: Memory Pillow, Size: Standard
The shredded foam used last year was really nice and soft and even firm to a point where your head is supported perfectly while you sleep. now the 2 extra pillows I received this weekend have completely different shredded foam which seems to be cheaper. Also when you unzip the pillow cover and get to the part where you can unzip the other cover where the foam is no longer is there. so they are using cheaper shredded foam and a cheaper cover to where the foam is and you can no longer unzip the second cover to see the foam. but I can easily tell that they are using different and cheaper foam which isn't true memory foam. their new blend is too fluffy and the pillows are floppy and too soft. the old ones i bought 1 year ago are heavy pillows that are true memory foam which your head molds into perfectly and are amazing. these new ones they are making aren't worth it. In one picture you can see the cover with different colored cheap foam and the other picture with the green and white thick premium quality shredded memory foam. The other pictures show how the old ones are thick and firm and moldable for you head and the other 2 are floppy because they use cheaper shredded foam. They need to use the shredded foam they used last year! it was really good! Now they are not true memory foam pillows anymore due to changing from premium shredded foam to cheap shredded foam.
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Reviewed in the United States on July 18, 2024
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Tonyamazin
Lexington, US
★★★★★ 5
Great comfortable, pillows.
Color: Black(4pack), Size: Standard
These are some great, comfortable pillows. They are soft and feel great. They are good for sleeping on or just using them to be comfortable in bed.
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Reviewed in the United States on April 23, 2026

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