How much of that glass tube needs to be under water ??
The reason I ask is I am thinking of modifying my Aqua Clear 70 HOB filter to accommodate a glass tube heater. Problem is my glass tube heater will NOT be underwater up to the line specified by the heater.
So I am wondering if this is a safety issue or a temperature control or regulation issue to have the water at that line ? Other than that the tube heater should fit with minimal modification to the filter media... Although that raises the question of the filter media getting burned or not by the heater being in contact with it...
Anyway... One step at a time..
