Need Advice on pond construction for Silver Arowana

[JOE22]

http://www.monsterfishkeepers.com/forums/threads/help-with-pond-build.659416/

I posted mine here, didn't realise there was a designated pond section.

It's for koi mainly, but I'm hoping to keep a gar, I'm not sure if it'd be big enough for an alligator gar though, don't really want the fish to suffer but all the petshops in my country mainly have alligator gar.

 

[burntrubber]

Why not get some flagtails? They are good at clearing algae as well and alot more interesting than plecos.

 

[Steven Williams]

Why not get some flagtails? They are good at clearing algae as well and alot more interesting than plecos.

I don't have any experience with flags tails but I've seen them in groups? And I've seen arowana keepers having them in their tank. Also I've never seen them at lfs