Here is a guy doing hydro very successfully in a greenhouse.
http://icmag.com/ic/showthread.php?t=132966
Looks super dense and frosty. Whats the smell like?
I really think the van island purple you got is purple pineberry or cortes purple. If I could imagine a cross between pineberry and trainwreck that would be it.
Maybe if you sent me a sample I could do some real detective work