Hello Dolly,
1) I believe cutting big fan leafs is ok, some people say NO! But if you haven't cut in a grow you need to be careful not to take to many, it can slow/harm your plant. If you are going to cut, take a couple and stop, don't cut again for a week. "You can always take more later but you can never put them back".
2) to transplant, have your new pot ready, fill up with soil and place your old pot in to make sure you have the right amount of soil in your new pot.
people use a butter knife around the edges, and gently try to loosen your pot from the soil. It helps to be a little damp but not wet! Hold your old pot at the bottom with one hand and your other hand at the base of you stem in between your thumb and finger, palm down over a tray to catch with the new pot close and flip, remover pot and place in new container, fill in edges with dirt. You can cut you old pot off too. JUST BE GENTLE WITCH EVER WAY.
3) your run off, This I'm not sure I don't use drops. My best guess is to try a test and see. Sorry just can't give you a good straight answer on this one, but you run off PH is important.
One last thing, your see though pot is not a good idea, roots do not like light.
Hope this helps and keep us posted.