SKU: 78931206070

Seachem Reef Builder

Sale price$111.60 Regular price$124.00
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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9

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Description

Seachem Reef BuilderSeachem Reef Builder Seachem Reef Builder is used to raise carbonate alkalinity (KH) in marine aquariums without impacting pH and without depleting calcium, magnesium, or strontium. Raises carbonate alkalinity (KH) with minimal impact on pH A blend of carbonate sources that will not lower pH as competing bicarbonate only products can Will not deplete calcium, magnesium, or strontium Seachem Reef Builder raises carbonate alkalinity without immediately

Seachem Reef Builder

Seachem Reef Builder is used to raise carbonate alkalinity (KH) in marine aquariums without impacting pH and without depleting calcium, magnesium, or strontium.

  • Raises carbonate alkalinity (KH) with minimal impact on pH
  • A blend of carbonate sources that will not lower pH as competing bicarbonate-only products can
  • Will not deplete calcium, magnesium, or strontium

Seachem Reef Builder raises carbonate alkalinity without immediately impacting pH. With long-term use, there will be a tendency to stabilize at pH 8.3. Carbonates and calcium are essential to all coral growth. If either becomes deficient, coral growth will cease, followed by a rapid decline in coral health. Used as directed, Reef Builder™ will not deplete calcium, magnesium, or strontium which usually tend to precipitate with increasing alkalinity. Reef Builder™ and Reef Buffer™ may be used together. Use Reef Builder™ to raise carbonate alkalinity without affecting pH. Use Reef Buffer™ to raise carbonate alkalinity and pH.
Why It's Different

Unlike the competition, Reef Builder™ contains calcium, magnesium, and strontium to compensate for the inevitable loss which occurs when raising alkalinity. It also contains sufficient magnesium to restore magnesium routinely depleted.

Directions

BEGINNER: Use 3 g (half a level teaspoon*) per 150 L (40 gallons) twice a week. Dissolve in at least 250 mL (1 cup) of freshwater. Check alkalinity every 2 weeks and adjust amount or frequency accordingly.

ADVANCED: Check alkalinity, then follow addition regimen above until alkalinity is adjusted to 4–5 meq/L. Each 3 g/150 L will raise alkalinity by about 0.25 meq/L. Quantity or frequency can be adjusted, but do not exceed 12 g/150 L per day. Thereafter, use as required to maintain alkalinity.

EXPERT: After determining the alkalinity consumption rate, set up a continuous drip system. Use the following formula to determine how much to add to your top-off water: m=0.08va (m=grams to add to top off water, v=volume of tank in liters, a=amount to raise alkalinity in meq/L). For example, if you want to raise your alkalinity by 1 meq/L in a 200 liter tank, then you would add 0.08x200x1=16 g into the top-off water. [For reference: 1 gallon*=3.8 liters, 6 g=1 teaspoon*]. Notes: Use MultiTest:™ Marine pH & Alkalinity to measure total alkalinity.HINTS: Use MultiTest:™ Marine pH & Alkalinity to measure total alkalinity.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78931206070

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Joe Garnace
Louisville, US
★★★★★ 5
Fun Christmas Sweatshirt
Color: 02 Green, Size: Large
I really like this sweatshirt. It was listed as men's so I ordered the large. The sleeves are pretty long, which I really like. Otherwise it fits slightly baggy, but I typically wear a women's large so I ordered the large hoping for a little bit oversized. The material is typical for what a normal sweatshirt is, but is a little more lightweight, which I like. It being a touch thinner allows for easier layering and not peeling it off halfway through the day. The graphic is nice, the colors are bold and crisp. I love Christmas and love having tons of different themed clothing to wear, so I'm super excited to add this to my stash.
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Reviewed in the United States on October 16, 2025
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Lloyd S.
Pawtucket, US
★★★★★ 5
Great
This Holiday sweatshirt is great, It's made great with soft materials. It fits perfectly not tight and not bulky. It's warm and can be worn over a t-shirt or a long sleeve shirt when it's cold outside. It doesn't twist or ride up. The design is well made and looks great. The colors are bright and look nice. It's great for the holidays but after they're over I'm going to keep wearing this because I like it. It's a great price because with proper care this sweatshirt will last for a long long time.
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Reviewed in the United States on October 14, 2025
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Carl
San Leandro, US
★★★★★ 5
great
Size: X-Large, Color: White
Great product, great price, I'm very happy with it!! it fits and looks great
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Reviewed in the United States on May 21, 2026
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Maria Garcia
Carnegie, US
★★★★★ 5
Quality Shirt!
Size: Medium, Color: Black Orange
A good quality shirt with an embroidered pattern. The fit was right on the arms and shoulders but ran big in the waist area. The fit really depends on your build. The price was fair for this quality, highly recommend!
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Reviewed in the United States on May 11, 2026
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RTD2
West Palm Beach, US
★★★★★ 5
great fit.
Size: Large, Color: Black Red
as advertised. great fit and looks great. thick fabric. very comfortable.
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Reviewed in the United States on May 21, 2026

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