Hobbyist
Magnesium The Reef Tank Parameter That Fixes the Two You're Actually Watching
If your alkalinity keeps sliding no matter how much you dose, magnesium is usually the parameter quietly causing it. Here's what it does and where it should sit.
ReefDiary Blog
Hobbyist guides
Practical hobbyist articles for reef and freshwater keepers who want clearer parameter history and better maintenance routines.
Hobbyist
PAR, Not Watts How to Actually Light a Reef Tank for Coral Placement
Watts and Kelvin tell you almost nothing about whether your light can grow coral. Here's how PAR actually works, what each coral type needs, and how AI, EcoTech, Kessil, and Orphek fixtures compare.
Hobbyist
Your Clean-Up Crew Is Either Working or Just Along for the Ride
Not every snail earns its keep. Here's which clean-up crew members are actually doing a job in your tank versus just decorative crawlers.
Hobbyist
The Reefer Rollercoaster Why We Keep Doing This to Ourselves
One day you're mourning a dead acan, the next you're grinning at a tank full of open polyps. Here's why reefkeeping wrecks us and we love it anyway.
Hobbyist
The Coral That Wouldn't Open A Story About Flow, Not Bad Luck
A sad, shrunken coral isn't always sick sometimes it's just sitting in the wrong current. Here's how to read the signs and zone your tank properly.
Hobbyist
The Ich Outbreak That Took My Tangs And Why the Wrasse Made It Out Alive
I lost my black tang, yellow tang, Atlantic blue tang, and my storm clowns to an ich outbreak in one bad stretch. Here's what happened, why the wrasse survived, and what I'm doing differently.
Hobbyist
We Tried Four Other Reef Tank Apps Before Building My Tank Log in ReefDiary
Reef Trak, Aquarimate, NextUpReef, ReefBay here's what each one actually does well, where they fall short for a serious reef tank, and why I ended up keeping my logs in ReefDiary.
Hobbyist
Why Water Parameter Testing Alone Isn't Enough And What Tracking Actually Gets You
Most reef tank problems don't start on the day you notice them. They start weeks earlier, as a slow drift in alkalinity or a nitrate curve creeping upward one test at a time invi