Direct Sunlight into our tanks good/bad?

[doublette]

One of my freshwater tanks gets the late afternoon sun. I was always told it would cause major algae problems, but it hasn't. The plants in the tank have grown like weeds since it's been getting the extra sunlight. I would think that a saltwater tank would be the same way, if your nutrients are in check then it shouldn't be a problem. Just my opinion.