a koralia one for flow in a ten gallon would be a little to much. i have a k1 in a 29 and a koralia nano in the 14g .... go with the nano.
and yes that plenty of lighting for softies in a ten gallon.
in the stock 14g biocube comes 2x24 and i keep softies light zoas,xenia, mushrooms, i had candy cane, toadstool leather, other things.. just gotta move closer to the light.