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Joseph8592
Hello, I don't even know if it's a problem or not, but in general, this is the first time I've encountered something like this. In my aquarium (250 liters), the calcium red algae have almost completely disappeared, and the rocks are covered with some brown, slightly filamentous algae. There are also locally green filamentous algae that don't disappear on their own, and I have to manually remove them from the rocks. They look green like moss and grow about 2-4 centimeters in height. I periodically remove them by hand. The aquarium was set up a year ago, but the appearance is somewhat discouraging; everything is covered with these brown algae, which sometimes appear on the substrate and glass, and I have to scrape them off. The aquarium is almost empty; there are 2 fish, 1 Diadema urchin, and a coral about 7 centimeters in diameter, which has grown about three times in a year. Calcium water is added, and according to tests, calcium is at 440. Nitrates are normal, salinity is 0.24, and I don't measure anything else. Osmotic water is added daily. What is wrong and how can I change the situation?
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