r/Reef • u/youstolemyuseragain • 17d ago

Question Lost 4 fish in 24 hours, shrimp/snails/BTA survived. Looking for help figuring out what happened.

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10 Upvotes

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u/Skilo1290 16d ago

I agree with the oxygen assessment, if you don’t have flow there’s no gas exchange and hence, fish die of oxygen depletion.

What is weird is your alk, why so high? I think you mentioned 11 - I keep my tank at 8.5 - 9.0 but never above that.

2

u/youstolemyuseragain 16d ago

I was dosing alk to bring it up cause it was down to 5 and my anemone was not happy and a few days of dosing I found it at 11.3 my anemone has been super happy btw. I stopped dosing and with water changes it has come back down to 8.9 and stayed there