Coral Colours and Amino Acids

[Ron99]

Looks like 0.4 to 0.5 volts from the heater and maybe 0.2 volts from my return pump. The pump could be putting out some inductive voltage due to the proximity of the motor to water. The heater is obviously leaking current somewhere. Looks like I'm picking up a new heater tomorrow and maybe a grounding probe for the sump too.

As for test results, on Nov 8th I had this:

pH 8.4
PO4, NH4, NO3, NO2 all zero
KH 7