Articles & Guides
Real reef care writing across every pillar - water chemistry, livestock, equipment, and troubleshooting. New pieces added regularly.
What Is Alkalinity (dKH)?
What dKH actually measures, unit conversions, and why stability beats hitting an exact number.
Two-Part Dosing vs. Calcium Reactor
Real cost, pH, and salinity tradeoffs, plus which one actually fits your tank.
Two-Part Dosing vs. Kalkwasser
Cheaper and won't raise salinity, but capped by evaporation, plus a real failure risk to know about.
How to Calibrate a Dosing Pump
Catch pump drift before it shows up as unexplained instability.
Why Your Alkalinity Keeps Swinging
Common dosing mistakes that cause instability, and the fix.
Clownfish Tank Mates: Full Compatibility Guide
Which fish and anemones actually work, and why "add clownfish first" backfires.
Clownfish and Damselfish Compatibility
Clownfish are technically damselfish. Here's which damsel species actually work.
What Size Protein Skimmer Do I Need?
Why the box rating is misleading, and a bioload-based method for sizing yours correctly.
Green Hair Algae: Causes and How to Get Rid of It
What actually causes it, how to tell it apart from Bryopsis, and why removal alone never sticks.
Dry vs. Liquid Dosing
Dry powder runs a fraction of liquid's cost. Here's what you trade for the convenience.
Tang Compatibility: Which Species Can Actually Be Mixed
Same-genus pairings are the highest-risk mix, and real tank-size guidance by species.
Protein Skimmer Ratings Explained
The same physical skimmer can carry two very different rated-gallon numbers. Here's why.
Cyanobacteria (Red Slime): Causes and Treatment
A treatment ladder that starts with the safest option, not the fastest chemical fix.
Reef Tank Bioload Explained
Bioload isn't fish count or tank size. It's total waste output, and the four real drivers behind it.
Most Aggressive Reef Fish (Add Last)
Which species should always go in last, after everything else is established.
Head Loss Explained
Why every source gives a different per-elbow number, and where they all come from.
PAR Requirements: SPS vs. LPS vs. Softies
The real biological reason SPS needs more light, and how to acclimate without bleaching it.
Sump-to-Display Ratio Guide
Why 25% is the floor, and how to calculate your own drain-back headroom.
Bubble Algae Removal Guide
Popping doesn't spread it, missed fragments do. And emerald crabs aren't a guaranteed fix.
Aiptasia: Identification, Removal & Prevention
Chemical vs. biological control, and why combining them backfires.
Coral Bleaching: Causes and How to Save It
The acute reef-tank triggers, and the real recovery window before it's too late.