09/06/2026
STORY TIME
Reefing always has a way of keeping you humble. 🪸😂
I’ve noticed some bleaching on a few of my stony corals over the last few days, so naturally it was time to figure out what the hell is going on.
I did a full battery of testing the other day and wrote down EVERYTHING… except magnesium. 🤦♀️
I swear I tested it, and if I did, I remember it hovering somewhere around normal. But I didn’t write it down, so I’m not going to pretend I know exactly what it was.
Fast forward to today. Magnesium tested around 1075 ppm. 😳 Alk was 8.6 and slowly coming back up, so at least that’s headed in the right direction.
I added 20 mL of magnesium just to give it a little bump — nothing crazy in a roughly 200-gallon system. I’m definitely not going to start dumping a bunch of stuff into the tank trying to fix everything overnight.
Tomorrow, we investigate. 🔬
I’ll pull one water sample, run all my tests again, and pull an ICP sample from that exact same water. When the ICP comes back, I can compare my home testing directly to the lab results and hopefully figure out what’s happening.
Luckily, my zoas, hammers and fox coral are all happy and healthy. It’s my stony corals giving me grief.
Which is also why you don’t see me selling a bunch of stony corals. 😂 I LOVE them, but man, they’re a hard one for me!
And that’s why I wanted to share this. A coral business page usually shows you all the pretty stuff. But sellers have reef problems too.
I’m still learning. I don’t have a perfect reef 100% of the time and I’m not going to pretend I do.
I’ll share what I find — even if it turns out I was completely wrong about what I thought was happening. 😂
Reefing always finds a way to keep you humble. 🪸
— Cox Marine Creations
Veteran Owned • Utah Grown • Reef Tested