Woke up this morning to my tank being covered by a white film. It wipes off very easily but is covering everything. I have not dosed anything to the tank i don't think that would have caused this. I added 10 ml calcium like i do every week. Dosed 1 ml of mag as usual per calc consumption. I have stopped testing the mag as the test kit is always off by 200 it seems, even when testing a calibration solution.. Any ideas
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![20240303_120306.jpg 20240303_120306.jpg](https://www.reef2reef.com/data/attachments/3472/3472434-1542c0feaf7d70eafb98552225ce9e19.jpg)