I used Guanokalong brand bat guano on my last grow, mixed into compost tea- with superb results. Serious organic growers like Soma seem to rate the stuff highly pretty highly for the sweetness it adds to the smoke. Recently I was browsing on Ebay for a new guano supply to use on the upcoming bloom phase of my grow. I have to admit I was a bit overwhelmed by the variety on offer with a wide range of mineral ratios , sources and compostions between them. I mean..Peruvian Seabird ? Mexican bat? ?Jamaican? 10,0000 year old Indonesian? with palm ash from a Janvanese volcano OR wild jungle cotton seed dust WITH hand crushed tropical fish dust? Pellets? Liquid concentrate? Where in the **** do I start?? So riddle me this -If YOU use the stuff-what TYPE and HOW do you use it in each or any phase of cannabis growth?