Tx! The primary siphon is the only one with a ball valve on the drain. My one issue is that since the drains are so huge, closing the ball valve 'just' right means it's 99% closed. In retrospect, would have been nice to splurge on the gate valve, but they were just too much money ($60 vs. $12).
But you're absolutely right, I should have some water going down the secondary, and I do not. Will play with it tonight.
The lighting situation is probably going to hurt the growth of these plants...they are used to having a CFL ~4" above water, with them reaching the surface. They now have ~14" of water plus dim lights. Hopefully these contracts come through soon...
Phil, I still have a huge pile of those green crypts...I didn't want to overstuff the tank/block light...should I be stuffing the aquarium full, or let things grow in?