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  "citation_candidate": "红龙鱼水质管理先守住稳定：日常温度可从27—29℃起步，总氨和亚硝酸盐不应持续检出，成熟缸每周换20%—30%可作为维护起点。不要为发色长期高温、重喂或频繁大换水；连续记录4周后再按鱼只呼吸、食欲和硝酸盐趋势调整。",
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