肥肥魚兄，一個星期換一半至八成水……這個做法比較另類。不知道你可不可以分享一下的換水的手法？例如有沒有下buffer令新加的水和原魚缸內的水的硬度、ph相近？嗯……河魨是一種很特別的生物。他們沒鱗片保護，理論上對水質變動是會有較大反應的；但同時偏偏他們之中（特別是汽水域和海水中生活的），很多都具有應乎滲透壓轉變的能力。所以，實質上他們往往能在水質環境不穩定、甚至水質惡劣的環境中生活一段時間。實在是一種矛盾又神奇的生物
。
希望能繼續看到你飼養經驗以作參考。
今天找到一些關於這種河魨（Takifugu ocellatus）的資料，跟大家分享一下：
「There seem to be an influx of these "peacock puffers" (Takifugu ocellatus), available in the aquarium trades lately. It's a shame really, since there has never been anyone (even the best puffer experts, Robert T Ricketts, a puffer keeper of over 40 years & Dr Klaus Ebert, author of The Puffers of Fresh & Brackish Waters) able to keep these puffers alive more than a few months.
RTR said, "I have tried 4 of them, various times and various water conditions. My shortest-lived was on the order of a week, the longest did grow a fair bit, but was still only a handful of months at the most - I don't have the exact figures handy. All were definitely still juvenile fish, all ate, all were active to hyperactive, and all died."
With that in mind, it would be best not to buy these puffers, as it will continue to deplete the natural populations, only to have the fish in a tank for a very short while. It's such a shame that collectors have no idea--they are taking them out of their home, to certain death! 」
「Here is what Dr Ebert says about this puffer: "This exceptionally attractive marine puffer is imported from China. It is a lively swimmer & neither a fin-biter nor aggressive towards conspecifics (it's own kind). Unfortunately it has proven tricky to maintain. No long-term data are available. It is hoped that this attractive puffer will be imported again so we can discover the optimal maintenance conditions for it & so that interested aquarists have a chance to try & breed this beautiful fish」
兩段摘錄均出自：http://www.wetwebmedia.com/pufferfaqs3.htm
全文是一些對答來的，恕我有點「斷章取義」的選取了部份「負面消息」來貼。
先撇開這種魚連「專家」都活不久不論。看到這種魚在魚街大量出現倒是令人有點擔心的。畢竟正如肥肥魚所說，很多人對這類魚都不太認識，魚店提供的資訊正確程度又……倒有點想問：有人知道為甚麼這種魚突然有那麼多來貨嗎？
補充：看來我當初功課做的不夠……不知道這種魚有這樣「難養」的紀錄。但我已經養了四個月多了……有點擔心。不知道有沒有魚友跟我一樣，在今年五、六月期間買而又能養到現在的？
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。想補充一點，就是人工飼養有時候會比野外的大一點點的……
湯米兄，我好像曾經在另一題目中，就「巿面上常見雞泡是否人工繁殖」的問題，提出與你不同意見。有甚麼得罪請多多包涵。只是，就我所看到的資料，繁殖汽水域、回遊性河豚的確有技術上的困難。或許是我孤陋寡聞，如有錯誤還請你指正和補充。