3.7 volts enough to do harm?

[hermitkrab]

Well I checked today to see if there is electricity in my water. And ya there is just like everyone else does. But is 3.7 volts enough to do any harm?

 

[dhughesz28]

Might depend on your fish, but I had around 7 volts in my tank. It made my Tang get HLLE and it nearly killed him. After I out the ground probe in the tank, the tank started to get better almost right away..

 

[wax32]

Make sure your outlet is actually grounded and if it is get a grounding probe. They are cheaper than new fish.