I know they do a specialised pond heater for QT tanks and they are made from metal not glass they even have a cut out Switch should your water level drop.
There is always the prolem with the glass heater of fish getting burned if they rest on the glass heaters not so the metal one , gie me time to dig it out and I'll let you know what its called however I have to find the damn thing yet lol
rgrds
Dave
There is always the prolem with the glass heater of fish getting burned if they rest on the glass heaters not so the metal one , gie me time to dig it out and I'll let you know what its called however I have to find the damn thing yet lol
rgrds
Dave