Tropica Nutrition Substrate Capsules (50 count / bottle) MSRP: $38.99 Tropica Nutrition Substrate Capsules - Root Tabs for Aquarium Plants provide extra nutrients to your aquarium plants with Tropica nutrition capsules place in aquarium substrate gravel with tweezers, close to roots of fast growth aquarium... Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP: $38.99 Subtotal: Add to Cart