How to Get Rid of Hair Algae in a Reef Tank (Without Wrecking Your Tank)
Green hair algae taking over your reef tank? Learn what causes hair algae, how to remove it, and how to keep it from coming back, step by step.
The Reef Lab Blog
Reef Tank Water Parameters: The Complete Beginner's Guide to Ideal Levels
What are the ideal reef tank water parameters? A complete guide to target levels for alkalinity, calcium, magnesium, nitrate, phosphate, salinity, pH, and temperature.
Why Your Coral Isn't Opening (Common Causes and Fixes)
Is your coral not opening or extending? Learn the most common reasons corals stay closed in a reef tank and how to get them happy and open again.
How to Get Rid of Dinoflagellates in a Reef Tank (A Practical Guide)
Battling dinos in your reef tank? Learn how to identify dinoflagellates, why they appear, and a step-by-step plan to beat them without crashing your tank.
How to Cycle a New Saltwater Tank: A Beginner's Step-by-Step Guide
New to reef keeping? Learn how to cycle a saltwater tank step by step, what the nitrogen cycle is, how long it takes, and how to know when it's done.
How to Lower Phosphates in a Reef Tank: A Practical Guide
Lower phosphates in a reef tank by cutting inputs, exporting nutrients, and using GFO or lanthanum—do it gradually. Target 0.03–0.10 ppm PO4.
Why Your Reef Tank Alkalinity Keeps Dropping (and How to Stabilize It)
Reef tank alkalinity dropping or swinging? Learn the real causes of unstable alk, how to fix it, and how to keep dKH steady for healthy corals.