Thanks for stopping by. Ask as many questions as you like bro!
1. I go off a few things. The hairs usually all turn brown when its close to being done. The stains can differ, but usually I wait to make sure there are no more flowers sprouting out. Also looking at the trics. I like to harvest when they have all turned cloudy and beginning to turn amber. I like about 20% amber in there. Also the fan leafs start to die and turn yellow. Those are the key signs I use.
2. Yes, depends on the strain. White Rhino usually does not have too much resin on all the leafs, so they get cut off. But Belladonna, it just covers the them so much, I just don't like wasting all that goodness. So it depends on how my buds look.
3. I have not re-used perlite yet. I got my first huge bag for about 20 bucks, the second bag, the shop forgot to charge me for, so I got lazy and used new perlite as its sterile and has no PH. But I am sure I will try re-using some day. If you are to re-use, I suggest getting a large but, port a hole on the bottome and hook up a valve to it. That way you can fill it up with 10-20% bleach, and water and soap, let it soak over night, and drain through the valve the next day. Then run about 20 gallons of freash water through it to get rid if all the bleach. Then lay out to dry. Kind of a pain in the ass, but you could do it.
Are you going to grow Hydro Ebb & Flow like me? If so post some pics of ur setup!