| Country of Origin | United States |
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Check the listing for details. Brightwell SpongExcel Ionic Silica Marine Aquarium Sponge Growth 125ml. Condition: New, Made in United States. Listed at 27.99 USD. OPTIMAL SILICA DOSING: Provides precise dosing of 1 drop per gallon to raise silica levels by 0.20 ppm, ensuring your aquarium maintains the ideal concentration to support silica-dependent species and their filtration needs.