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 Pro's
 They're easy AF.
 One less thing to contribute to old tank syndrome.
 You can get mad flow.
 
 Con's
 
 Obviously, asthetics.
 Harder to get a good rock foundation (though I use cement or epoxy to stabilize)
 You have to plan ahead and paint the bottom of the tank to avoid that ugly refraction through water and a perpendicular glass panel.
 
				__________________This and that.
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