Ok, My fiance bought me a 50g aquarium from PetSmart last month and it came with 2 hoods for it. Well at the time I planned on a SA Cichlid setup so I sold the 2 hoods thinking I'd be buying a 48" T5 Fixture... Well not the case, I'm now going to do a African Cichlid setup and I regret selling my hoods.. I bought 2 Marineland 20g 24x12 hoods but they are about 3/4" too long, and a bit to wide from front to back. I'm going to be taking them back, I'm trying to find 2 All-Glass hoods for a 20g aquarium because thats what came with mine and fit perfect. Basically im just venting lol but I'm wondering why the 20g hoods from Marineland didnt fit if the 20g hoods from All-glass fit?