Just wanted to bump this old topic up to update medication options. New Life has recently come out with a food to treat Spironucleus aka hexamita, so if your loaches are still eating this is certainly another great option that I personally recommend.
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=30015
More info in this past topic ....
http://www.monsterfishkeepers.com/forums/threads/new-life-spectrum-hex-shield.595746/
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=30015
More info in this past topic ....
http://www.monsterfishkeepers.com/forums/threads/new-life-spectrum-hex-shield.595746/