Find Reviews and Compare Prices for:       All ProductsAdditives & Supplements     3.0 (2)   Add a review Marc Weiss Blackpowder 4 oz.   BlackPowder 112 grams by Marc Weiss. Your living reef comes vibrantly alive with BlackPowder. Designed to maximize growth and color in everything from anemones to coral, sea apples to sea cucumbers, filter feeders to... Have a question? Just Ask! Member Reviews Compare Prices Product Spec Send to a friend Set Price Alert Searched Marc Weiss Blackpowder 4 oz. in 150 stores, 2 results found Image Description   Store   Price Marc Weiss Blackpowder If this item doesn't belong here, click Remove and help us keep our results accurate.   Amazon.com   2 Store Reviews   $15.99 Go to Store Marc Weiss Blackpowder If this item doesn't belong here, click Remove and help us keep our results accurate.   Amazon.com   2 Store Reviews   $50.44 (used) Go to Store You can also search these stores   Find this product on eBay   eBay   5 Store Reviews   Search on eBay Are we missing a store? Let us know! Something wrong in this page? Let us know! Related products: More Marc Weiss Additives & Supplements Other Additives & Supplements internal use: spec162 spec204