In this case I think you may have made too large of a starter for the older packs. I personally would've babied it. Starting with 500ml 1.020 to wake it up. From there I would've stepped it up to 1L 1.040 to build up the cell count a bit then 2L 1.040 to beef it up a bit more and save some slurry for later. You may have been fine going with 1L 1.020 even. That starter does not appear to have taken off yet from the pics. I could be wrong though. All of my starters begin like yours looks then end up nice and milky, sometimes with a nice krausen, on the stir plate. Keep us posted on the starter!