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Angela6489
I bought the anti-phosphate Fauna in Ultra Power Phos 500ml. The packaging is intact and branded. I'm scared to add it to the aquarium because it turns the water a brownish-red, like rust. I started rinsing it and have already used 15 liters of osmosis water, but there is no effect; every time after rinsing, the water looks rusty. Do I need to rinse this anti-phosphate?