IceManDug wrote:
I would recommend checking the pH. When the pH is low, the xenia will stop
their pulsing. You should also check the specific gravity, temperature, and
alkalinity.

Whatever is affecting them hasn't affected their activity. They are
pulsing like mad and contracting into a ball on a regular basis.

SG is 1.024
Temp is 78

I don't trust my pH/Alkalinity tests but they show

ph 8.0 - 8.4
Alkalinity somewhere between 150-300

They are lit with 65w 10k and 65w actinic PC lights.

-K