Alkalinity
G2100 · 500ml
Support coral growth and maintain stable pH levels in your reef aquarium. Alkalinity plays a vital role in the success of every reef aquarium. It serves two essential functions—stabilizing pH...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
Support coral growth and maintain stable pH levels in your reef aquarium.
Alkalinity plays a vital role in the success of every reef aquarium. It serves two essential functions—stabilizing pH levels and supporting coral skeleton formation. Acting as a natural buffer, proper alkalinity prevents rapid pH swings that can stress or harm marine life.
In addition, alkalinity provides carbonate ions that combine with calcium to form calcium carbonate, the structural foundation of coral, invertebrate shells, and coralline algae. Maintaining consistent alkalinity ensures steady coral growth, healthy biological processes, and overall system balance.
For best results, we recommend keeping alkalinity between 7.5–9.5 dKH, with minimal daily fluctuation. Stability is key to sustaining vibrant coral health and long-term water chemistry balance.
Key Benefits:
• Helps maintain a stable and balanced pH level
• Provides essential carbonate ions for coral and invertebrate growth
• Promotes strong skeletal development and coral calcification
• Prevents harmful pH swings that can stress aquarium livestock
• Encourages a stable, thriving reef environment
Recommended Levels:
7.5–9.5 dKH
Directions for Use:
Add 5 ml of Alkalinity per 100 L (25 gal) of aquarium water to raise alkalinity by 0.125 dKH.
Test levels regularly and adjust dosage as needed to maintain consistency.
Build around the Alkalinity.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from dosing & testing. Most buyers reading this page should buy the middle column.
Calcium
Alkalinity
Jebao Doser 3.1 Single Dosing PumpAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.