Sodium sulfate food grade anhydrous, 40 lb vs Copper sulfate crystals 99.8% pure [fine grade] - 10 lbs

Key Differences

Dibbs Farms Copper Sulfate (A) is a fine-grade, 99.8% pure copper sulfate crystal product made in the USA and lists in a more affordable price tier; Duda Energy Sodium Sulfate (B) is a 40 lb food-grade anhydrous sodium sulfate marketed as an effective drying agent but has some reports of particles that don't dissolve and serves different uses (food-grade/ drying applications). Choose A if you need high-purity copper sulfate crystals for inorganic or farm-chemical uses; choose B if you need a larger-quantity, food-grade anhydrous sodium sulfate primarily as a drying agent or for food-grade applications