Oh shit I didn't even notice the 80%RH! Yikes, you need a burlier exhaust fo sho, son!

Just keep checking and adjusting your res pH until it stays stable. You essentially have to 'break in' the hydroton like a pair of hiking boots... use it during this process at your peril... you're gonna get blisters until the problem is fixed!

Hmm... everyone thinks I'm a dude this week too... gender check... hey! Boobs! Cool!