Trailermann Posted June 17, 2020 Share Posted June 17, 2020 No, not on fish. I am referring to the specks on the glass which I presume is calcium deposits. What causes this, and what can I do different? This photo is of my 20 gallon coral quarantine tank. Calcium reading is in range of 420. Quote Link to comment Share on other sites More sharing options...
Taylorhardy1 Posted June 17, 2020 Share Posted June 17, 2020 Spirorbid worms 1 Quote Link to comment Share on other sites More sharing options...
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