I'm pretty sure they will find their way home In the current tank the hardest thing for me to find are the zebra loaches; the angels are easy enough to track. The new tank the planting will be a bit different. I'll go with slightly smaller swords and leave the middle of the tank more open since it will be a bit deeper. The 120 is only 2 feet width and the swords are too large - being able to cover front to back. I actually need to find a decent sword that is larger than 12 inch but won't grow 25 or 30 inches like the current ones (i.e, the ones i have are either too large or too small for the back).