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A calcium reactor is one of the most powerful tools for maintaining stable calcium and alkalinity in a reef tank. But like any precision system, it needs to be properly tuned to perform at its best. In this guide, we’ll walk you through: How a calcium reactor works How to fine-tune it step by step A real example setup ⚙️ How a Calcium Reactor Works A calcium reactor dissolves media by lowering the internal pH using CO₂. This process: Releases calcium Releases alkalinity (KH) Feeds it back into your tank via effluent 👉 The goal is controlled dissolution, not maximum output. 🎯 What You’re Trying to Achieve Maintain stable alkalinity (KH) in your tank — not to constantly increase it. Ideal Targets: Tank KH: 7.5 – 8.5 dKH Reactor pH: 6.3 – 6.7 Effluent: steady, consistent flow 🧪 Step-by-Step: How to Fine-Tune Your Reactor 1️⃣ Set a Baseline Start with conservative settings: CO₂: 2–3 bubbles per second Effluent: slow, steady stream Pump speed: 60–70% power Let the system run for 24–48 hours before making adjustments. 2️⃣ Check Reactor pH This is your most important indicator. If pH is above 6.7 → not enough CO₂ → increase slightly If pH is below 6.3 → too much CO₂ → reduce 3️⃣ Monitor Tank KH Daily This tells you whether your reactor is matched to your tank demand. KH dropping → increase CO₂ slightly KH rising → reduce CO₂ or increase effluent flow 👉 Make small adjustments only and wait 24 hours between changes. 4️⃣ Fine Tune Effluent Flow Think of it like this: CO₂ = strength of solution Effluent = how much you deliver If you need more output: Increase CO₂ OR Increase effluent flow slightly Real Example (500L Reef Tank) System: Tank: 500L (CADE S2 1200) Reactor: Seatorch SM-80X Mixed reef Final dial-in settings: CO₂: ~2.5–3 bubbles/sec Effluent: steady thin stream (~50 mL/min) Pump: ~65% Reactor pH: ~6.5 Tank KH: stable at 8.3 👉 Result: Stable parameters Consistent coral growth Minimal daily adjustment Every tank is different. If you need help tuning your system: Contact us anytime — we’re happy to help you get the most out of your setup. Next blog we will takling common mistakes to be avoid. Stay turn! 

Engineered for Performance, Not Just Function A calcium reactor isn’t just about dissolving media—it’s about how efficiently and consistently it does it. SeaTorch calcium reactors are designed with an optimised internal flow path, ensuring every drop of water is fully utilised. Instead of water bypassing media (a common issue in standard reactors), the SeaTorch design forces complete circulation and contact, delivering maximum efficiency with less CO₂ waste. Signature Internal Flow Design Our central flow system (red pipe design) is not just for aesthetics—it’s engineered to: Drive water upward through the chamber Return it evenly through the core Eliminate dead zones and channeling Maximise CO₂ absorption and media dissolution Stability You Can Rely On SeaTorch calcium reactors are built to deliver: Consistent alkalinity and calcium output Minimal fluctuation once dialled in Smooth, predictable performance for SPS systems Precision Build Quality High-grade materal for durability and clarity Precision fittings and seals to prevent leaks Clean, professional construction suited for serious reef systems DC pump in build for fine tune Whether you're running a mixed reef or SPS-dominant system, SeaTorch reactors are designed to handle: High calcium demand Long-term continuous operation Heavy bioload environments SeaTorch Calicum Reactors available in 4L to 12L+ models. Fully modular add-on media chamber system. Easily scale capacity as coral demand increases.  SeaTorch calcium reactors give you the flexibility to build a filtration system that evolves with your reef.

What Is a Calcium Reactor? A calcium reactor is a piece of equipment used in reef aquariums to maintain stable calcium and alkalinity levels automatically. It works by: Injecting CO₂ (carbon dioxide) into a sealed chamber Lowering the pH inside the reactor Slowly dissolving calcium-rich media (aragonite) Releasing calcium, alkalinity back into your tank What other equipment you will need to set up a calcium reactor:  Calcium reactor (e.g. Seatorch SM-60X) CO₂ cylinder CO₂ regulator + solenoid Bubble counter Feed pump (or manifold from return pump) Reactor media (aragonite) Optional: pH controller (recommended) Why Not Just Dose? Dosing works—but here’s the difference: Dosing add liquids daily or via doser, but can become unstable as demand increases.  Calcium Reactor: Runs 24/7 automatically, adjust once, then minimal maintenance. Scales easily with coral growth. That’s why experienced reefers switch to reactors for long-term stability.  If you’re serious about coral growth and long-term stability, it’s not just an upgrade—it’s a game changer. With SeaTorch calcium reactors, you’re investing in precision, reliability, and performance trusted by advanced reef keepers. SeaTorch calcium reactors are available in 4 different models, with media capacities ranging from 4L to 12L or add-on chamber, allowing you to choose the perfect size for your reef system. From compact setups to high-demand SPS systems, there is a SeaTorch reactor designed to match your needs.  

MBBR Bio Media Reactor VS Meida Reactor This is a very common confusion in aquarium filtration—because both look similar (same reactor body), but they work completely differently. Media ReactorDesigned for chemical filtration, a media reactor forces water through specialised media such as carbon or GFO to remove impurities, toxins, and excess nutrients. It delivers targeted, high-efficiency water polishing. MBBR Bio Media ReactorBuilt for biological filtration, an MBBR reactor uses freely moving bio media to cultivate beneficial bacteria. These bacteria naturally break down ammonia and nitrite, providing a powerful and stable biological foundation for your system. How it works: Media Reactor Pump pushes water through a fixed chamber Media stays mostly static or gently tumbling Used for: Carbon → remove toxins GFO → remove phosphate Biopellet → reduce nitrate It’s mainly chemical filtration (and some biological if biopellet) MBBR Bio Media Reactor Uses floating media (K1, K3, etc.) Media is constantly moving (fluidized) via air or flow Bacteria grow on media surface (biofilm) It’s pure biological filtration. Breaks down: Ammonia → Nitrite → Nitrate Key Differences: Media Reactor → Remove stuff (phosphate, toxins) MBBR → Process waste biologically Media Reactor → Replace media regularly MBBR → Almost self-cleaning (very low maintenance) When to use which? Use Media Reactor if: You need: Crystal clear water Phosphate control (reef tank) Chemical filtration Example: SPS reef systems Use MBBR if: You need: Strong biological filtration Heavy bioload system Fish-only or high nutrient tanks

Choosing the right skimmer isn’t just about buying the biggest or most expensive model. It’s about finding the perfect match for your aquarium’s size, bio-load, and long-term goals. In this guide, we’ll break down exactly how to choose the ideal skimmer—and how the SeaTorch Ultra Marine Skimmer series fits into that decision.

Learn how internal and external protein skimmers work and explore why the SeaTorch Ultra Marine Skimmer is an excellent choice for reef aquariums.