I had a leak and took my 150gallon tank to Forever Pets off of San Pedro. They charged me 135.00 to reseal the entire tank and move the back glass that had no scratches to the front. They charged me 15.00 to move my overflow boxes as well. The only concern they had was since i had overflow boxes on the back, was the sealant might have a shadow when then moved the back glass to the front. As far as i could see there was no problem. Hope this helps.