Recently bought a second hand s 500 and on getting it into the house I tapped the bottom corner on the door frame and it cracked the the tank. It is about a 1cm from the edge and about 10 cm tall which goes from the bottom corner up and out then back on itself then round to the other side and then meets the silicone until about a cm from the bottom back to the edge of the glass, absolutely frustrated with myself as I have been wanting one these tanks for a long time, is there anything that can be done?