I gave them nothing but Phed water for about a week, but they might need to get the entire mix flushed out. Because I don't have an irrigation system this requires quite a bit of work... but in the end it may be worth it.

I was just afraid if I gave them a solid flushing, I would need to work up super slowly to 900 PPM... and I wanted to give them the "Shooting Powder" for the last few weeks before giving them nothing but ph'ed water for the last week or so.

I was also browsing through House and Garden's Website...and I realized you are never supposed to introduce their product "Drip Clean" that supposedly will clean out metals from your medium, lessening the need for flushing... well, I introduced it mid cycle which may have caused the salts\metals to be released after they had already build out. So... I am thinking I may be locked out because of that and other reasons.