AquaticTechTank.net

wow, nice. I'll have to study that for a while.
From experience though, the fishes were on the verge of death through an accident at sensor reading of 24,000+ppmv or with my calculations ~90ppmw.
They were upside down and one jumped out of the tank to get away. I noticed distress at 60ppmw or 16,000ppmv when I was systematically pushing the limits.

So with your calculation of 30,000ppmv @ 45ppmw, is sure death while we know that fish as a whole can survive 45ppmw with no problem. So I would question the algorithm you used.

ok i see the pictures of your design now. Do you see much difference between the measurements obtained with your floating sensor vs the version 1 submersed sensor?

I use superglue to glue the pieces together around the circuit board for a snug fit. I then silicone the edges to make it air tight.
I'll post a picture of the current iteration tomorrow.

The wires are flexible so it can adjust to the water level and glued on floatation works fine.