Well when I look at my DIY co2
reactor the water fills up the entire chamber. While there is a large current going through it, I'm pretty confident it would register it as being in the water.
and as for adjusting it, that shouldn't be very difficult as I plan to have the top of the heater sticking out of the PVC
sealed off with some marine epoxy.
The only questions I have are size concerns. I know that the caps on the PVC
pipe's make a V shape so I would need to measure out where to cut the whole. Plus I don't know if there is enough room for a circle to be cut out of that size in the cap.
Anywho, just some thoughts as it would be nice to take the heater out of the tank.