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Debra8438
The coral of the same color is producing polyps, but three times less compared to how it was before. The coral has been in the aquarium for a month, but it has shrunk as if it had been there for 5-7 days. What has changed: - I increased the metal halide lighting time by 1 hour (total 5 hours 30 minutes) - during water changes (twice 18 liters, system 300 liters) I started using Pro-Reef salt (before that, I was using NEKA Coral (90%) and Instant Ocean (10% - for changes and top-offs)) - the temperature dropped by 1.5°C - from 26.5 to 25. The water parameters have not changed. Nitrates are 0, phosphates are 0.1 (they have been like this since the start with fresh salt). The coral's origin is Vietnam. ----------------------------------------------------------------------------------------- I am pondering: - It’s unlikely that the salt (brand) would have reacted so sharply in terms of alkalinity and calcium - I read that they are very sensitive to temperature, but in this range (24-28), I’m not sure it’s that critical. - Is the metal halide "burning" it? The evening after purchasing the coral, I found this kind of worm: I have listed all related events with this coral. How does this coral live in your systems? Are there periods of size reduction? Is it very sensitive to temperature changes?