Tank heaters revisited

[Red Coral Aquariums]

The titanium submersible heaters with external controllers are the way to go.
From the directions sheet.
" The titanium tubing resists corrosion caused by salt water or ph fluctuation of water"
On the other hand many submersible glass heaters do not specify if they are salt water resistant. I am slowly changing the store over to the titanium heaters as I am tired of getting shocked. Logic states keep the electronics out of the water. LOL

mytworotties;
You are doing everything correctly (unplugging during H2O change and keeping the electronics out of the water) but if you want a true submersible you would need a titanium element with controller.

Cheers
Kevin