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Collection: Additives

Additives for reef, freshwater, and planted aquariums — from calcium, alkalinity, and trace elements to plant fertilizers, bacteria, and water conditioners. Test first, then dose to what the water actually needs.

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260 products

Brightwell Aquatics FlorinMulti - 500ml
new

Brightwell Aquatics FlorinMulti - 500ml

Regular price $19.85
Sale price $19.85 Regular price
Aqueon AquaPacs Water Clarifier - 12 Pack

Aqueon AquaPacs Water Clarifier - 12 Pack

Regular price $11.43
Sale price $11.43 Regular price $13.45
Aqueon AquaPacs Sludge Remover - 4 Pack

Aqueon AquaPacs Sludge Remover - 4 Pack

Regular price $6.50
Sale price $6.50 Regular price $7.65
Seachem Reef Builder - 300 Gram

Seachem Reef Builder - 300 Gram

Regular price $11.99
Sale price $11.99 Regular price $15.99
Seachem Betta Basics - 250 mL

Seachem Betta Basics - 250 mL

Regular price $11.99
Sale price $11.99 Regular price $15.99
Brightwell Aquatics Florin-P - 500ml
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Brightwell Aquatics Florin-P - 500ml

Regular price $19.85
Sale price $19.85 Regular price
Aqueon AquaPacs Water Conditioner - 4 Pack

Aqueon AquaPacs Water Conditioner - 4 Pack

Regular price $6.50
Sale price $6.50 Regular price $7.65
Aqueon AquaPacs Water Conditioner - 12 Pack

Aqueon AquaPacs Water Conditioner - 12 Pack

Regular price $11.43
Sale price $11.43 Regular price $13.45
Seachem Reef Iron - 250ml
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Seachem Reef Iron - 250ml

Regular price $8.33
Sale price $8.33 Regular price $9.80
Brightwell Aquatics Florin-K - 500ml
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Brightwell Aquatics Florin-K - 500ml

Regular price $19.85
Sale price $19.85 Regular price
Brightwell Aquatics MicroBacter Start XLM - 2 Liter

Brightwell Aquatics MicroBacter Start XLM - 2 Liter - RECENTLY EXPIRED

Regular price $169.99
Sale price $169.99 Regular price $202.35
Brightwell Aquatics Erase-CL

Brightwell Aquatics Erase-CL 125ml

Regular price $4.99
Sale price $4.99 Regular price $8.99
Brightwell Reef BioFuel - 500ml front of bottle

Brightwell Aquatics Reef BioFuel - 250ml

Regular price $12.99
Sale price $12.99 Regular price $17.99
Brightwell Aquatics Iodion - 500ml front of bottle

Brightwell Aquatics Iodion - 250ml

Regular price $24.05
Sale price $24.05 Regular price
Brightwell Aquatics X-port Bio Cubes - 250ml

Brightwell Aquatics X-port Bio Cubes - 250ml

Regular price $9.99
Sale price $9.99 Regular price $13.99
Seachem Marine Buffer - 250 Gram

Seachem Marine Buffer - 250 Gram

Regular price $11.99
Sale price $11.99 Regular price $15.99
Brightwell Aquatics Erase-CL

Brightwell Aquatics Erase-CL 250ml

Regular price $9.99
Sale price $9.99 Regular price $13.99
Brightwell Aquatics Erase-CL

Brightwell Aquatics Erase-CL 500ml

Regular price $16.99
Sale price $16.99 Regular price $21.59
Brightwell Aquatics FlorinGro - 500ml
new

Brightwell Aquatics FlorinGro - 500ml

Regular price $16.87
Sale price $16.87 Regular price $19.85
Seachem Malawi/Victoria Buffer - 300 Gram

Seachem Malawi/Victoria Buffer - 300 Gram

Regular price $9.10
Sale price $9.10 Regular price

Why Your Aquarium Needs Dosing

Every tank consumes something. Reef systems burn through calcium, alkalinity, and magnesium as corals grow; planted tanks deplete iron and macronutrients; a new setup needs bacteria before it can hold livestock. The right additive depends on what you keep and what your test kit tells you. We stock additives from Seachem, Red Sea, Brightwell, Aquaforest, Tropic Marin, ESV, API, Fritz, Dennerle, and Tropica — covering both the reef and freshwater/planted sides of the hobby.

Sort by What You Keep

  • Reef & marine — calcium, alkalinity, and magnesium supplements, plus trace elements and ZEOvit-system dosing.
  • Freshwater & planted — complete and iron-based fertilizers, root tabs, and liquid carbon.
  • Cycling & bacteria — nitrifying bacteria and cycling accelerators for new tanks.
  • Water conditioners — dechlorinators and tap-water conditioners for every water change.

Not sure what your tank is short on? Test first, dose second — chasing numbers you haven't measured is how most tanks get out of balance. Email info@jlaquatics.com if you want a hand matching a regimen to your setup. J&L has supplied Canadian aquarists since 1997.

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.