I use this product to isolate marine fish from serious diseases ie Ichthyophthyroidism and Sea Velvet it is not aggressive to fish and its Price is very good, I would recommend Hanna Copper Check if you use copper for a more accurate measurement.
π Two Little Fishies Marine Snow ATLMSPD4, 16.9 oz
10 Review
12 Count Greenpro Root Tabs Fertilizer Tablets: Ideal For Aquariums, Ponds & Water Gardens!
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9 Review
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68 Review
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34 Review