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Collection: Additives

Reef, freshwater, and planted tank supplements: calcium, alkalinity, trace elements, plant fertilizers, bacteria, and conditioners. Test first, then dose to what the water actually needs.

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260 products

ZEOVit Trace Element Complex - 500ml

Aquarium Additive

ZEOVit Trace Element Complex - 500ml

3.0 out of 5 stars, 1 review
Regular price $40.70
Sale price $40.70 Regular price
ZEOVit Bio-Mate - 10ml

Aquarium Additive

ZEOVit Bio-Mate - 10ml

4.0 out of 5 stars, 1 review
Regular price $27.15
Sale price $27.15 Regular price
ZEOVit ZEObak - 50ml

Aquarium Additive

ZEOVit ZEObak - 50ml

Regular price $99.15
Sale price $99.15 Regular price
ZEOVit Amino Acid Concentrate - 50ml

Aquarium Additive

ZEOVit Amino Acid Concentrate - 50ml

Regular price $71.95
Sale price $71.95 Regular price
Two Little Fishies Two Little Fishies

Aquarium Additive

Two Little Fishies C-Balance Calcium & Alk Additive - 16oz

Regular price $23.83
Sale price $23.83 Regular price $32.55
Two Little Fishies C-Balance Calcium & Alk Additive - 1 Gallon

Aquarium Additive

Two Little Fishies C-Balance Calcium & Alk Additive - 1 Gallon

5.0 out of 5 stars, 2 reviews
Regular price $67.70
Sale price $67.70 Regular price
Seachem Reef Calcium - 500ml

Aquarium Additive

Seachem Reef Calcium - 500ml

5.0 out of 5 stars, 1 review
Regular price $15.05
Sale price $15.05 Regular price
Seachem Liquid Marine Buffer - 500 ml

Aquarium Additive

Seachem Liquid Marine Buffer - 500 ml

Regular price $15.25
Sale price $15.25 Regular price
Seachem Marine Buffer - 500 Gram

Aquarium Additive

Seachem Marine Buffer - 500 Gram

Regular price $16.95
Sale price $16.95 Regular price
SeaChem Reef Builder - 1.2 KG

Aquarium Additive

Seachem Reef Builder - 1.2 KG

5.0 out of 5 stars, 1 review
Regular price $25.00
Sale price $25.00 Regular price $30.80
Seachem Laboratories Seachem

Aquarium Additive

Seachem Reef Carbonate - 500ml

Regular price $10.10
Sale price $10.10 Regular price
Seachem Reef Buffer - 500 Gram

Aquarium Additive

Seachem Reef Buffer - 500 Gram

Regular price $11.73
Sale price $11.73 Regular price $16.95
Seachem Laboratories Seachem

Aquarium Additive

Seachem Marine Buffer - 4 KG

Regular price $67.36
Sale price $67.36 Regular price $97.40
Seachem Alkaline Buffer - 4KG

Aquarium Additive

Seachem Alkaline Buffer - 4KG

Regular price $97.40
Sale price $97.40 Regular price
Brightwell Strontion - 500ml

Aquarium Additive

Brightwell Aquatics Strontion - 500ml

Regular price $22.60
Sale price $22.60 Regular price
Brightwell Aquatics Iodion - 500ml front of bottle

Aquarium Additive

Brightwell Aquatics Iodion - 500ml

Regular price $24.05
Sale price $24.05 Regular price
Brightwell Aquatics NeoMag Media

Aquarium Additive

Brightwell Aquatics NeoMag Media - 1 KG

Regular price $22.29
Sale price $22.29 Regular price $27.45
Brightwell Kalk +2 - 450 Gram front of package showing instructions and guidelines

Aquarium Additive

Brightwell Aquatics Kalk +2 - 450 Gram

Regular price $25.71
Sale price $25.71 Regular price $31.60
Brightwell Potassion potassium additive for reef aquariums

Aquarium Additive

Brightwell Aquatics Potassion Liquid Potassium Additive - 500ml

Regular price $22.60
Sale price $22.60 Regular price
API Stress-Zyme - 16oz

Water Treatment

API Stress-Zyme - 16oz

5.0 out of 5 stars, 1 review
Regular price $25.50
Sale price $25.50 Regular price

Dose What You Measure

Adding supplements without testing is guesswork. A reliable test kit tells you what your water is actually short on — then you dose to correct it and retest to confirm. That order keeps parameters stable instead of swinging.

Additives by Tank Type

  • Reef and marine — calcium, alkalinity, and magnesium to replace what growing corals consume, plus trace elements.
  • Planted and freshwater — complete and iron fertilizers, substrate tabs, and liquid carbon sources.
  • New setups — beneficial bacteria and cycling boosters to establish biological filtration.
  • Every water change — conditioners that neutralize chlorine and chloramine from tap water.

Match the additive to the livestock and plants you keep, and keep dosing consistent — small regular amounts beat large occasional corrections. Questions about building a dosing routine? Email info@jlaquatics.com.

J&L Aquatics was formed in December 1997

Our business was started from our love of the aquarium hobby. We at J&L Aquatics felt that the Canadian aquarist should have the option to purchase top quality supplies, equipment and livestock other than the generally over priced local retail stores.