RAW Kelp is a soluble plant supplement that is used for horticultural purposes. RAW Kelp is 99% Kelp (Ascophyllum Nodosum). This product is fully water soluble and contains only 1% soluble potash which is a direct reflection of its purity. A 2 oz package of RAW Kelp makes up to 200 gallons, an 8 oz package makes up to 800 gallons and a 2 lb package makes up to 3200 gallons. RAW = soluble.