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Sydney
Hello, I am a beginner. I have a 300-liter aquarium and a 90-liter sump. I restarted it in November due to changing the location of the aquarium. The parameters are normal: pH 7.9, KH 8, calcium 460, temperature 25 degrees. At first, I was struggling with dinoflagellates, I treated it, and now cyanobacteria are coming back, but they are not increasing. I siphoned it out, and it appears again. I treated for that too, but it comes back. Silicates, nitrates, and nitrites are all almost 0. There are 30 kg of rocks and 25 kg of aragonite sand, 3 cm throughout the aquarium. The corals are not growing at all in the sump, and I installed LED lights.