Take a look at the links below for more information on the many aspects of indoor gardening.
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Hydroponics 101: Gardening with Grodan
Tips & info for successful hydroponic gardening, focusing on rockwool
http://grodan101.com/
BBC Gardening
Very helpful website that offers a step by step at identifying plant diseases/pests.
http://www.bbc.co.uk/gardening/advice/pests_and_diseases/