With the highly modified grains these days you don't really need to do the iodine test. Most of the conversion happens in the first 20 minutes, the rest of the mash is "making tea", extracting colors and flavor.
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger