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Michele
Hello!!!! Guys, here's the story: my entire system consists of 700 liters, including a small 150-liter aquarium and a large 400-liter fresh one. The rest is a sump and a cooler of 80 liters. I brought in fish and added 400 to the aquarium, everything seemed fine, but the crypts started to shed a bit. There were two torpedoes and two UVs, one in the sump and the other in the aquarium. So, I transferred the fish to the quarantine tank: a chrysipter, a small surgeon, a zebrasoma, and a foxface. Everything seemed fine after a few baths with anti-parasite treatment. Then I went to Kyiv for an exhibition and bought a small butterfly and two premium clownfish, which I also added to the quarantine tank, by the way, it's 80 liters. I fed them a couple of times, and when I woke up the next day, everything was in strong cryptokorine. I measured the nitrites, and there were a lot, about 1 mg/L. After water changes, nothing dropped, so I decided to move them back. In the 400-liter aquarium, it was 0.025, but after the transfer the next day, it became 0.5 mg/L in the morning, and in the evening it was 0.1 mg/L. The next day in the morning it was again 0.5 mg/L, and in the evening it was again 0.1 mg/L. In both aquariums, 10,000K MH lights are on for 6 hours. Can you tell me if bacteria consume more NO2 in light????? By the way, the fish were not fed!!!! What can be done with the crypts???? In the overall system, will they be fine under normal conditions, or do I need to do something????? In the aquarium, there are 2 torpedoes and two UVs!!!!