Why do Discus need 28–31 °C (82–88 °F) water?

Below 27 °C, a Discus's metabolism and gut immunity drop sharply, making them highly susceptible to intestinal flagellates (Hexamita) and bacterial infections.

Can I keep a single Discus fish?

No. Discus are hierarchical schooling cichlids that become stressed and stop eating if kept alone; always keep a group of at least 5–6 individuals.

七彩神仙鱼

Symphysodon aequifasciatus · 科:Cichlidae

别名:野生蓝七彩, 绿七彩神仙

Discus (Symphysodon aequifasciatus) — aquarium fish — Wikimedia Commons / CC BY-SA

温度: 28–31 °C
pH: 6–7
硬度: 1–8 °dGH
缸体容积: 250 L 起
最大体长: 可达 20 cm
群体规模: 最少 5,理想 6
性情: 温和
活动水层: 中层
难度: 专家
寿命: 10–15 年

概述

七彩神仙鱼（Symphysodon aequifasciatus）被誉为“热带观赏鱼之王”，体态圆润如盘、色彩绚丽。作为亚马逊河群居慈鲷，它们需要极高水质、软酸水（pH 6.0–7.0，GH 1–8）以及28–31°C的高温环境。

饲养

建议在250升以上鱼缸中群养5–6条七彩神仙，配备带UV杀菌灯的变频大滤筒、精准恒温加热棒（29–30°C）及RO反渗透纯水。详见：/articles/discus-fish-water-parameters-temperature-guide。

投喂

每日2–3次投喂高蛋白七彩神仙专用颗粒饲料（含虾红素与螺旋藻）、丰年虾及消毒冻红虫，幼鱼需少食多餐。

繁殖

配对成鱼会在软酸水中将卵产在繁殖筒上，孵化后的鱼苗依靠啄食亲鱼体表分泌的营养粘液（“七彩奶”）成长。

兼容性

红鼻剪刀
Hemigrammus rhodostomus
Родостомусы отлично переносят 28–30 °C и служат идеальным индикатором чистоты воды в аквариуме с дискусами. / Rummy-Nose Tetras thrive at 28–30 °C and act as ideal dither fish and water-quality bio-indicators for Discus.
良好
荷兰凤凰
Mikrogeophagus ramirezi
Апистограммы Рамирези любят такую же тёплую (28–30 °C) и мягкую воду, занимая придонный ярус. / German Blue Rams share identical warm (28–30 °C), soft, acidic water requirements and occupy the bottom zone peacefully.
良好
黄王子
Labidochromis caeruleus
Африканские цихлиды требуют жёсткой щелочной воды и слишком агрессивны для спокойных дискусов. / African cichlids require hard alkaline water and are far too boisterous for peaceful Amazonian Discus.
避免

常见问题

Why do Discus need 28–31 °C (82–88 °F) water?: Below 27 °C, a Discus's metabolism and gut immunity drop sharply, making them highly susceptible to intestinal flagellates (Hexamita) and bacterial infections.
Can I keep a single Discus fish?: No. Discus are hierarchical schooling cichlids that become stressed and stop eating if kept alone; always keep a group of at least 5–6 individuals.