Too strong a nute solution can be caused by old nutes seeping from the media. Some of the best growers I know are non-technical people.. They also can as you say grow the hell out of the plants. I've no dought you are successful. Baking hydroton does not work to remove salt buildup. Use Florakleen for buildup of calcerous materials on media it breaks the bond to some extent. "I have used my Hydroton cleaned with a Bleach solution for 4 grows, so far. With no problem." I also do things that don't make sense and lots of times they work out fine. All I am saying is maybe people here should stop contradicting others before they have done their homework, this has happened to me several times and normally I just don't bother but for some strange reason I did this time. Likely will not happen again.

Herbus