Everything sound cool. Only one more question.

What is your water source ?

I tried to mix in half city water and it, I assume the chlorine gave me a fit for a week untill it stablized..

It's not the airstones or everyone would be on here asking.

You don't have any drip ? That would wash down hydrotron so I don't see that as a problem.

Like reaper said keep at it. Something has changed with your water I bet.