[問題] 水草變黃疑問
設缸已一個月左右, 90*50*60三尺缸, 每週都換水三分之一, CO2每秒兩顆, 看到水草前
端開始變黃也逐漸擴散開來, 水草皆是陰性草, 只有PH測試筆, 測到7.2,這是主因嗎?
附圖請大家解惑
http://i.imgur.com/JgfDefq.jpg



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