Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
I use the hydros for my gyres
Both work well, it connects with apex via another cable to be enable feed mode.
I haven’t figured out how to customize a secondary feed mode profile through apex
people have done the comparisons for both apogee and the iphone app, both are usualyl +-10 par from each other.
someone on this forum i spoke with recently did a similar comparison and confirmed
your call and whatever makes you most comfortable!