They will do fine with no current and they should live just fine in that pond. Honestly if your muskie reach over 3' I will be impressed. They do get to 5+' in the wild but I cannot fathom that happening in captivity. Also don't be surprised if one grows faster than the other and eats it.
Chad
Chad

got got go guys cya keep posting tho
srry about the 800gal+ its realy gonna be 2250gal its 9x9x4 srry i just found out on