Hey one way of bringing it out will include a bottle of wine , tweezers and a cotton ball and some formuline.. first pour a glass of wine .. sit next to tank , place arm into tank along the bottom , commence to sit there finishing bottle until leech appears and attaches , extract arm and use tweezers (lit cig can subsitute) to remove said leech .. then use cotton ball to stop bleeding... then place said leech in the nasty liquid , formuline not the wine .. and send pic of said leech to this site for us to identify ........
hopefully it won't be a spiney eel