They may provide some very small benefits through micronutrients, but compared to the risk of introducing contaminants or messing with the pH of your media, I'd say just avoid that type of stuff. If you want to make your plant into a more vigorous grower, stick to the products that greenhouses and nurseries use. Seaweed extracts like KelPak, probiotics like Quantum-Total, and a good fertilizer regimen. There's plenty of threads here on nutrient additives and micronutient products. Happy growing!