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Openai/6957b7f1-7b1c-8001-afad-2fc4124c1caa
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=== Assistant: 好,這樣就清楚了:你這罐是用「P₂O₅(五氧化二磷)」來標示磷含量(1.3%),而水草缸我們通常關心的是 PO₄³⁻(磷酸鹽)。 === 好,這樣就清楚了:你這罐是用「P₂O₅(五氧化二磷)」來標示磷含量(1.3%),而水草缸我們通常關心的是 PO₄³⁻(磷酸鹽)。 ==== - P₂O₅ → 元素磷 P:P = P₂O₅ × 0.436 ==== * P₂O₅ → 磷酸鹽 PO₄:PO₄ = P₂O₅ × 1.338 所以你這罐 P₂O₅ 1.3% 等效約: * P 約 0.57% * PO₄ 約 1.74%(=1.3%×1.338) : ==== 你瓶身:950 L 加 7 mL → 上升 0.15 mg/L(我用 PO₄ 來解讀) ==== ===== - 7 mL × (167 / 950) = 1.23 mL ===== * 所以 你這缸加 1.23 mL ≈ PO₄ 上升 0.15 mg/L ===== - 0.15 ÷ 1.23 = 0.122 mg/L PO₄ / mL ===== 因此你若設定: * 0.2 mL/天 → 每天約 +0.024 mg/L PO₄ * 一週累積(若完全被植物/系統吃掉前先不算消耗)約 +0.17 mg/L PO₄ 這個起手式在「你魚很多、NO3 已有 5–10」的情境下,屬於很保守、相對安全的補磷強度。 ==== ### ==== * PO₄:0.2 mL/天(每日固定) ===== - 若出現綠斑藻(玻璃硬點)、矮珍珠/牛毛停滯: → 上調到 0.3 mL/天,跑 7 天觀察 ===== * 若絲藻/毛藻變多(或整體更容易長膜): → 降到 0.1 mL/天,或停 3–5 天再回 0.1–0.2 ==== 你只寫「K₂O」但沒寫 %。 ==== 請你回我:K₂O 是幾 %? 因為如果 K₂O 也有含量,我就能順便算出:你補磷的同時,這罐到底幫你補了多少 鉀(K)(K = K₂O × 0.830),讓你跟自製 K₂SO₄ 的鉀補給不打架、也不會過量。
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