Just got my order, havent tested the porduct yet but will update soon. This is the blend the professionals trust in growing hydroponic tomatoes and will make approximately 400 gallons of fertilizer. Hydroponic supplies archives page 2 of 2 morgan county. The formulation of 4 1838 has been developed from hydrogardens years of experience with hundreds of growers across the country. Looking for masterblend tomatolettuce fertilizer 4 1838 anyone know of any sources for hydroponics fertilizer simular to masterblend 4 1838 with micro nutrients. All bags are made form a specially formulated plastic that provides for a longer life than any other on the market. Masterblend 41838 hydroponic tomato formula 25 pound bag. All upright bags are fluted with prepunched drainage holes and easily stand upright when filled with media. Masterblend hydroponic tomato 41838 fertilizer provides plants in a hydroponic system with the essential macro and micro nutrients that. Hydroponic supplies archives page 2 of 2 morgan county seeds. It has the ideal balance of growing nutrients needed for healthy tomato plants. Because of the unique composition, it is recommended to use the 41838. You can wind your own by hand during the off season.