Just got 2x55g for $80 bucks on CL, one had the silicone all messed up and decide to do it all over. I removed the old silicone, cleaned with rubbing alcohol and applied the new silicone. I'm happy with the results.
REMOVED SILICONE
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gresealed01_zpstarjh06e.jpg
PREPARED THE TANK
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gtaped03_zpsa1gn6odi.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gtaped02_zps8hv0i5mm.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gtaped01_zpszh9qf7er.jpg
TAPE REMOVED
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/Ciliconed01_zpschz4jdp1.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/Ciliconed02_zpslozeinx0.jpg
TESTED FOR WATER LEAKS
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/20140322_114512_zpsluety9hp.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/20140322_114552_zpsf0qsb6dh.jpg
REMOVED SILICONE
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gresealed01_zpstarjh06e.jpg
PREPARED THE TANK
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gtaped03_zpsa1gn6odi.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gtaped02_zps8hv0i5mm.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/55gtaped01_zpszh9qf7er.jpg
TAPE REMOVED
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/Ciliconed01_zpschz4jdp1.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/Ciliconed02_zpslozeinx0.jpg
TESTED FOR WATER LEAKS
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/20140322_114512_zpsluety9hp.jpg
http://i280.photobucket.com/albums/kk183/Gilcano/Fish/20140322_114552_zpsf0qsb6dh.jpg