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Hydroponics & Indoor Gardening Learning Center Hydroponics Here's a good article for beginners to hydroponics discussing different types of systems and how they work. Hydroponics, gardening without soil. Article about hydroponics and four different types of systems. How to build a typical ebb and flow tray system. Instructions for the Multi Flow System. Perhaps the best hydroponic system ever made. ;) And a sales flier. Frequently asked questions page about hydroponics and indoor gardening. Here's a definition of Rockwool and description of the different products used for hydroponics. Details about our popular Multi Flow Hydroponic System.   Hydroponic Nutrient Flora Nutrient Weekly Feeding Calculator. Use this to create a table you can use from beginning to end. To find the N-P-K ratio for a blend of the three Flora nutrients use the Flora Nutrient Calculator Flora Nutrient Mixing Rates for some popular hydro crops. One of many mixing ratios for the General Hydro Flora Nutrient. Nutrient strength is measured in parts per million (PPM) and electrical conductivity (EC). Learn why you should know the difference Basic nutrient deficiencies table. With a list of elements that may be the suspect. Flora Nutrient Guaranteed Minimum Analysis. Details of each element in the Flora Nutrient. Symptoms of deficiencies and toxicities for the 13 elements found in hydroponic nutrient. Indoor Gardening Controlling heat in the grow room is very important. This article will give you an idea of how it's done. Specifications for the exhaust blowers including wattage and air flow.   Indoor gardening and the environmental issues you will face. .Here is a CO2 calculator that will tell you how long a carbon dioxide tank will last. How to take and root cuttings (clones). This is probably the hardest part to master.   Grow Lights A page about the different types of grow lights and how to select one. Do you want to run you lights on 220 volts to save power? If so, you should read this first. Watts cheaper 110 or 220? The basic information on how to choose a grow light Compare prices and basic features of three of our most popular light systems Here's a page about the different types of lights that can be used for growing. In depth article about how to build a grow light controller or a relay to switch on many lights. Calculator for finding the cost to operate a grow light and the bulb replacement cost. A definition of CRI, Color Temperature and Lumens for high intensity discharge lights. HID Ballast Guide from Advance transformer. Includes specifications and lamp types. 68 page file.   Hydroponics Manufacturers American Agritech manufactures many  hydroponic systems and nutrient formulas. We can get everything they offer. Grodan Manufacturer of the most popular rockwool for hydroponics. The hobby grower website is here General Hydroponics Best know for their nutrient. They make the AeroFlo, WaterFarm & RainForest systems. Many of their products are listed on our site. Green Air Products One of the pioneers in the hydroponics industry. These guys make environmental controllers, CO2 enrichment products and nutrient.   Plug 'n' Grow A relative newcomer to the industry. This company makes some real nice environmental controllers. High Intensity Discharge (HID) Lighting Manufacturers Advance Transformer manufactures the best ballasts for grow lights. Magnetek Another ballast manufacturer. Sylvania Our preferred manufacturer for lamps. Very reliable bulbs. Philips Another lamp manufacturer. they make the original Son Agro lamp. Sunmaster makes high output lamps for the hydroponics industry. Hortilux high performance grow lamps. Other Helpful Links GardenGuides is a well-recognized gardening resource for flower, herb and vegetable gardeners containing over 400 original articles. GardenWeb a cool site with great forums and a glossary of botanical terms Need to find out how many ounces are in 600 teaspoons? Try Online Conversion Convert just about anything to anything else. Arizona Biological Control (ARBICO) for beneficial insects. If your considering a commercial hydroponics operation, the Mayhill Press has some books and videos to help you get started. Looking for some good temperature and humidity meters? Dickson  has many high end thermometers and hygrometers that have some cool features. Want to get away from it all? Antarctica Hydroponics has information and links to hydroponics locations operating on the bottom of the chilly continent.