I have used Great White on my seeds and seedling plugs before (all plants are currently in my two big setups), all plants have survived and have an amazing root production. I have even applied great white directly to the root ball in my current epic buzz DWC run with no issues.
If I use Orca in my DWC I usually add a little Canna boost to feed it and top up the Orca roughly every 3-4 days. As long as the aeration is proper in you reservoir there should not be any issues. (
growdiaries.com/diaries/185718-grow-journal-by-salokin/week/1073905) here an example of what Orca did within a week in my DWC. If you are running only a DWC and not RDWC there is no equipment to clog up anyways.
whatever product you will use make sure your solution is well mixed & aerated and you'll be fine!