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Stock clearance sale on now! Hundreds of products reduced to clear. While stocks last.
Stock clearance sale on now! Hundreds of products reduced to clear. While stocks last.

Reef Builders, Buffers & Conditioners

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Seachem Pristine

Original price $10.95 - Original price $64.95
Original price
$10.95 - $64.95
$10.95 - $64.95
Current price $10.95
Out of stock

Pristine™ uses bio-augmentation, a non-chemical and natural method, to improve water quality. It provides bacteria that break down excess food, was...

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Original price $10.95 - Original price $64.95
Original price
$10.95 - $64.95
$10.95 - $64.95
Current price $10.95
Sold out

Red Sea Reef Foundation B Carbonate & Buffer - KH/Alkalinity

Original price $31.95
Original price $31.95 - Original price $31.95
Original price $31.95
Current price $20.00
$20.00 - $20.00
Current price $20.00
1 in stock.

Carbonate & buffer complex for balanced formation of Coral Skeleton. Calcium, magnesium, strontium and carbonate are the basic foundation eleme...

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Original price $31.95
Original price $31.95 - Original price $31.95
Original price $31.95
Current price $20.00
$20.00 - $20.00
Current price $20.00
Save 37% Save %

Red Sea Reef Foundation C Magnesium - Mg

Original price $45.95 - Original price $159.00
Original price $45.95 - Original price $159.00
Original price $45.95
$30.00 - $100.00
$30.00 - $100.00
Current price $30.00
1 in stock.

Reef Foundation C : A magnesium complex for balanced formation of coral skeletons Calcium, magnesium, strontium and carbonate are the basic found...

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Original price $45.95 - Original price $159.00
Original price $45.95 - Original price $159.00
Original price $45.95
$30.00 - $100.00
$30.00 - $100.00
Current price $30.00
Save up to 37% Save %

Seachem Reef Kalkwasser

Original price $28.95 - Original price $59.95
Original price
$28.95 - $59.95
$28.95 - $59.95
Current price $28.95
1 in stock.

Reef Kalkwasser™is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater ...

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Original price $28.95 - Original price $59.95
Original price
$28.95 - $59.95
$28.95 - $59.95
Current price $28.95

API Proper pH 8.2 200g

Original price $25.95 - Original price $25.95
Original price
$25.95
$25.95 - $25.95
Current price $25.95
2 in stock.

Automatically sets and stabilizes pH at 8.2. For saltwater, brackish and African cichlid aquariums. Use when setting up aquarium or changing water....

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Original price $25.95 - Original price $25.95
Original price
$25.95
$25.95 - $25.95
Current price $25.95

Seachem Marine Buffer

Original price $28.95 - Original price $49.95
Original price
$28.95 - $49.95
$28.95 - $49.95
Current price $28.95
1 in stock.

Marine Buffer™ will safely raise marine pH to 8.3. It will not raise pH above 8.3 even if inadvertently overdosed. Marine Buffer™ is a blended prod...

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Original price $28.95 - Original price $49.95
Original price
$28.95 - $49.95
$28.95 - $49.95
Current price $28.95

Seachem Reef Complete

Original price $16.95 - Original price $84.00
Original price
$16.95 - $84.00
$16.95 - $84.00
Current price $16.95
1 in stock.

Reef Complete® is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natura...

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Original price $16.95 - Original price $84.00
Original price
$16.95 - $84.00
$16.95 - $84.00
Current price $16.95

Seachem Reef Fusion 2

Original price $19.95 - Original price $35.95
Original price
$19.95 - $35.95
$19.95 - $35.95
Current price $19.95
2 in stock.

Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1™ provide...

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Original price $19.95 - Original price $35.95
Original price
$19.95 - $35.95
$19.95 - $35.95
Current price $19.95

Seachem Liquid Marine Buffer 500ml

Original price $26.95 - Original price $26.95
Original price
$26.95
$26.95 - $26.95
Current price $26.95
2 in stock.

Liquid Marine Buffer® will safely raise marine pH to 8.3 while adjusting alkalinity. It will not raise pH above 8.3 even if inadvertently overdosed...

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Original price $26.95 - Original price $26.95
Original price
$26.95
$26.95 - $26.95
Current price $26.95

API Marine Stress Coat 473ml

Original price $35.95 - Original price $35.95
Original price
$35.95
$35.95 - $35.95
Current price $35.95

Fish & tap water conditioner. The only marine water conditioner with the healing power of Aloe Vera. Developed for use with a protein skimmer: ...

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Original price $35.95 - Original price $35.95
Original price
$35.95
$35.95 - $35.95
Current price $35.95

Seachem Reef Buffer

Original price $16.95 - Original price $49.95
Original price
$16.95 - $49.95
$16.95 - $49.95
Current price $16.95
1 in stock.

Reef Buffer will also raise carbonate alkalinity; however, it is intended primarily for use as a buffer in a reef system where the maintenance of a...

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Original price $16.95 - Original price $49.95
Original price
$16.95 - $49.95
$16.95 - $49.95
Current price $16.95

Seachem Marine Trace

Original price $15.95 - Original price $24.95
Original price
$15.95 - $24.95
$15.95 - $24.95
Current price $15.95
1 in stock.

Replenishment of a number of trace elements is required to maintain an environment ideal for the growth and reproduction of marine life, but while ...

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Original price $15.95 - Original price $24.95
Original price
$15.95 - $24.95
$15.95 - $24.95
Current price $15.95

Seachem Reef Calcium

Original price $15.95 - Original price $24.95
Original price
$15.95 - $24.95
$15.95 - $24.95
Current price $15.95
3 in stock.

Reef Calcium™ is a concentrated (50,000 mg/L) bioavailable polygluconate complexed calcium intended to maintain calcium in the reef aquarium withou...

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Original price $15.95 - Original price $24.95
Original price
$15.95 - $24.95
$15.95 - $24.95
Current price $15.95

Seachem Reef Advantage Magnesium

Original price $16.95 - Original price $59.95
Original price
$16.95 - $59.95
$16.95 - $59.95
Current price $16.95
1 in stock.

Reef Advantage Magnesium™ is a concentrated (80,000 ppm) optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted lev...

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Original price $16.95 - Original price $59.95
Original price
$16.95 - $59.95
$16.95 - $59.95
Current price $16.95

API Marine Stress Zyme 473ml

Original price $38.95 - Original price $38.95
Original price
$38.95
$38.95 - $38.95
Current price $38.95
1 in stock.

API® Marine Stress Zyme contains millions of live bacteria that consume sludge and organic debris, reducing aquarium maintenance by keeping live ro...

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Original price $38.95 - Original price $38.95
Original price
$38.95
$38.95 - $38.95
Current price $38.95

Seachem Reef Pack Fundamentals 3 x 100ml

Original price $29.95 - Original price $29.95
Original price
$29.95
$29.95 - $29.95
Current price $29.95
1 in stock.

Includes Reef Complete, Reef Carbonate, & Reef Plus. Provides calcium, carbonate, trace components, vitamins, and amino acids. Calcium and car...

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Original price $29.95 - Original price $29.95
Original price
$29.95
$29.95 - $29.95
Current price $29.95

Seachem Reef Reactor

Original price $54.95 - Original price $89.95
Original price
$54.95 - $89.95
$54.95 - $89.95
Current price $54.95
1 in stock.

Reef Reactor™ is a high-purity source of aragonite, which supplies all important elements for optimal ionic balance and robust coral growth and col...

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Original price $54.95 - Original price $89.95
Original price
$54.95 - $89.95
$54.95 - $89.95
Current price $54.95

Seachem Reef Advantage Calcium

Original price $19.95 - Original price $49.95
Original price
$19.95 - $49.95
$19.95 - $49.95
Current price $19.95
4 in stock.

Reef Advantage Calcium™ is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in ...

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Original price $19.95 - Original price $49.95
Original price
$19.95 - $49.95
$19.95 - $49.95
Current price $19.95

API Marine Complete Trace 473ml

Original price $39.95 - Original price $39.95
Original price
$39.95
$39.95 - $39.95
Current price $39.95
3 in stock.

API® Marine Complete Trace acts as an all-natural source of over 60 trace elements found in sea water, plus iodine. It replenishes trace element im...

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Original price $39.95 - Original price $39.95
Original price
$39.95
$39.95 - $39.95
Current price $39.95

Seachem Reef Carbonate

Original price $11.95 - Original price $18.95
Original price
$11.95 - $18.95
$11.95 - $18.95
Current price $11.95
3 in stock.

Reef Carbonate™is a concentrated (4,000 meq/L) optimized blend of carbonate and bicarbonate salts designed to restore and maintain alkalinity in th...

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Original price $11.95 - Original price $18.95
Original price
$11.95 - $18.95
$11.95 - $18.95
Current price $11.95

Seachem Reef Builder

Original price $17.95 - Original price $49.95
Original price
$17.95 - $49.95
$17.95 - $49.95
Current price $17.95
11 in stock.

Reef Builder™ raises carbonate alkalinity without immediately impacting on pH. With long term use there will be a tendency to stabilize at pH 8.3. ...

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Original price $17.95 - Original price $49.95
Original price
$17.95 - $49.95
$17.95 - $49.95
Current price $17.95

FritzZyme 9 Saltwater Nitrifying Bacteria

Original price $17.95 - Original price $49.95
Original price
$17.95 - $49.95
$17.95 - $49.95
Current price $17.95
4 in stock.

FritzZyme® 9 contains live saltwater-specific strains of live nitrifying bacteria proven to reduce fish loss due to toxic levels of ammonia and nit...

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Original price $17.95 - Original price $49.95
Original price
$17.95 - $49.95
$17.95 - $49.95
Current price $17.95

Seachem Reef Iodide 500ml

Original price $24.95 - Original price $24.95
Original price
$24.95
$24.95 - $24.95
Current price $24.95
1 in stock.

Reef Iodide™ is a concentrated (8,000 mg/L) stabilized potassium iodide source for reef aquaria that will restore and maintain iodide levels to tho...

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Original price $24.95 - Original price $24.95
Original price
$24.95
$24.95 - $24.95
Current price $24.95

API Marine Calcium 473ml

Original price $39.95 - Original price $39.95
Original price
$39.95
$39.95 - $39.95
Current price $39.95
1 in stock.

Calcium is vital for the proper health, growth, and coloration of your fish. API® Marine Calcium is a natural way to increase calcium levels in you...

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Original price $39.95 - Original price $39.95
Original price
$39.95
$39.95 - $39.95
Current price $39.95