We present deep g - and r -band Magellan/Megacam photometry of two dwarf galaxy candidates discovered in the Dark Energy Survey ( DES ) , Grus I and Indus II ( DES J2038–4609 ) . For the case of Grus I , we resolved the main sequence turn-off ( MSTO ) and \sim 2 mags below it . The MSTO can be seen at g _ { 0 } \sim 24 with a photometric uncertainty of 0.03 mag . We show Grus I to be consistent with an old , metal-poor ( \sim 13.3 Gyr , [ Fe/H ] \sim - 1.9 ) dwarf galaxy . We derive updated distance and structural parameters for Grus I using this deep , uniform , wide-field data set . We find an azimuthally averaged half-light radius more than two times larger ( \sim 151 ^ { +21 } _ { -31 } pc ; \sim 4 \farcm 16 ^ { +0.54 } _ { -0.74 } ) and an absolute V -band magnitude \sim - 4.1 that is \sim 1 magnitude brighter than previous studies . We obtain updated distance , ellipticity , and centroid parameters which are in agreement with other studies within uncertainties . Although our photometry of Indus II is \sim 2 - 3 magnitudes deeper than the DES Y1 Public release , we find no coherent stellar population at its reported location . The original detection was located in an incomplete region of sky in the DES Y2Q1 data set and was flagged due to potential blue horizontal branch member stars . The best fit isochrone parameters are physically inconsistent with both dwarf galaxies and globular clusters . We conclude that Indus II is likely a false-positive , flagged due to a chance alignment of stars along the line of sight .