I have a 400gal. stock tank on it's way ( 77"Wx52"Lx24"H). I plan on turning it into a ray pond and should have the funds to do it by the end of the summer. For filtration I plan on ordering a NitraMax 2,000 . I'm a extreme noob when it comes to filters and pumps etc. so what exactly do I need as far as pumps go? Do I need a intake and a return pump? Is there a way I can utilize the 1" drain plug for the intake pump? For heating do you recommend in-line heaters? So I still need heaters,pumps,piping. Am I missing anything important? Thanks for any help. 

I've heard a lot of good things about Mag-Drives so I would prefer to go with them, but I'm always open for suggestions.