What is cited as perhaps the single fastest way to compromise an Arowana's long-term health?
Answer
Using a small or inadequately sized tank.
When discussing the requirements necessary for an Asian Arowana to achieve its maximum potential lifespan, the physical enclosure size is highlighted as a critical, non-negotiable factor. Because these fish can grow substantially, often exceeding three feet in length, they require massive tank setups. Keeping the fish in a tank that is small or insufficient for its adult size is identified as the most immediate and detrimental action an owner can take, capable of compromising the fish's long-term health irrespective of how well other elements like feeding or filtration might otherwise be managed.

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