Deformations have occurred on the protective baskets of the ProTemp S heater. What is the reason and what can I do about it ?
The protective baskets protect the ornamental fish against burns from the heating element’s surface.
When the heater is in operation it gives off heat to the surrounding water. With calcareous water, scale (precipitation of calcium carbonate) can form where the glass meets the water and this reduces the thermal dissipation. An excessive formation of scale may cause heat accumulation which can lead to overheating and a deformation of the protective baskets.
With hard starting water a regular decalcification of the heating elements e.g. with JBL Clean A or JBL pH Minus is recommended.