ive had my common pleco for around 2 years, he was in my 20gal for half a year, so then i bought a 39gal and he has been in there ever since, he is now 9inches long, hes doing very well, but i was unaware when i bought him that he would get to over 20inches, i am never going to have a tank big enough for him, so i thought now is the best time to give him away, ive asked in the paper and in pet shops, they haven't got the room for him either, what shall i do?