News

Coral frags in a newly established reef tank
Cycling a New Reef Tank: The Eight Weeks That Decide Everything
Ammonia up, ammonia down, nitrite up, nitrite down, nitrate present. Everything else is detail — and rushing it is why most new tanks fail. Read more...
Mixed reef corals in a healthy aquarium
Alkalinity Swings: The Most Common Way Reefers Lose Corals
Alkalinity is always falling and always being chased. Why a 1 dKH-per-day limit matters, and why the correction usually does more damage than the deficit. Read more...
Montipora-Eating Nudibranchs: The Pest That Hides in Plain Sight
Montipora-Eating Nudibranchs: The Pest That Hides in Plain Sight
Colour-matched to the coral, feeding on the underside, laying egg spirals on bare skeleton. Here is how to find them and the repeat-dip routine that clears them. Read more...
Zoa Pox, or Something Else? Diagnosing a Closed Zoanthid Colony
Zoa Pox, or Something Else? Diagnosing a Closed Zoanthid Colony
White pitted spots and closed polyps might be zoa pox — or the nudibranchs and sundial snails that get blamed on it. Rule those out first. Read more...
Red Bugs on Acropora: How to Spot Them Before They Cost You a Colony
Red Bugs on Acropora: How to Spot Them Before They Cost You a Colony
Half a millimetre, yellow with a red dot, and the only symptom is acros that stop looking right. How to find them and what actually clears them. Read more...
Dinoflagellates vs. Cyano vs. Diatoms: Identifying the Brown Stuff
Dinoflagellates vs. Cyano vs. Diatoms: Identifying the Brown Stuff
Gritty dust, slick sheets or stringy snot? Three different organisms, three different causes, and only one of them is a real problem. Read more...
How to Get Rid of Aiptasia Without Spreading It
How to Get Rid of Aiptasia Without Spreading It
Scraping aiptasia does not remove it, it propagates it. Here is why, and what actually kills it for good. Read more...