Right on, I'm bout to start mine in a week or so. First true hydro for me. How deep were you flooding them and what size of pot?
Pots are homemade, 1-1.5+ gallon.
With Hydrton or similar media the top inch or so should be dry to discourage algae and mildew. I was flooding to maybe a half inch from the top of the media, it was almost floating. Also I was using 1.5in rockwool cubes, even after adjusting the water level at or below the cubes I did not like how they worked so I ripped them off at transplant. Could have been user error but they seemed to discourage root growth. Next round is started in a mix of peat, perilite and vermeculite that will be rinsed off at transplant. I have settled on about 1.75in below top of media for the water level though.