I got electrical shocks when I put my hand into my newly setup refugium tank water this morning. When I used a digital multimeter to measure the voltage difference between the water and the earth, guess what is the reading? AC200 V
In order to find out which equipment is leaking the current. I turn on them one follow by onother and the accumulated reading is shown as follow:
All equipment OFF: ~5V Maybe due to electron takes time to discharge.
Normal ballast driven light: ~20V
Power head: ~50V
AC Fan: ~200V
I finally found that the high stray voltage is caused by the unearthed AC fan. So I connected the metallic part of the fan to ground pin, the stray voltage drop to around 8V. So I urge your guys who are using unearthed AC fan to cool your tank, please ground the fan ASAP.
I am now looking for Titanium probe to get rid of the remaining stray voltage. After searching the forum, Hongqixian state that the bike shop near to NA no longer stock titanium spokes because they break easily. I have also asked some bike shops, but the onwer don't even know what is the spoke made of. Someone also said that coralife probe sold by SL is stainless steel.
So anyone know where to get titanium probe?