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1. Drewgard 304 Biocide/Corrosion Inhibitor Description: Phosphonate-based corrosion inhibitor for condenser water circuit. Packing Size: 25 kg pail (manufacturer standard). 2. Biosperse 3204 Microbiocide Description: Alternate broad-spectrum microbiocide for condenser water circuit. Packing Size: 25 kg pail (manufacturer standard). 3. Drewgard 2808 Corrosion Inhibitor Description: Nitrite-based corrosion inhibitor for chilled water circuit. Packing Size: 25 kg pail.