L
L.R. This product came with our IHarvest and we loved how our lettuce varieties and sweet peas, basil, etc. grew. Our unit remained clean and everything flourished. The only downside is the shipping costs. It's over 1/2 the price of product. Other online options are cheaper, but our unit wasn't as clean. Wish they offered it on line where there is free shipping. I think it'd be good for sales and a win-win for everyone. So we are experimenting to see if this product makes the difference. Nevertheless, our hydroponic plants thrive on it.