i have had mixed luck with the aqueon tanks. i have had ones that i have ran for years with no issues. although the last one i have had, it sealant started to fail about a year after i set it up. luckaly i am in the process of breaking that tank down anyway to change stock out so i can reseal it but if i wasnt, it would be a real pain. i would recommend getting a acrylic tank if you can afford it. They are much lighter. i had a 120 glass and it weighs as much if not more than my 300 acrylic.