Clownfish with white marks

Two heaters on a controller, one, turns on at 2 degrees below main heater.

Then if one fails off, the other starts.
If either or both get stuck on, the controller won’t let the water get too hot.

Heater failure is very common.

Sorry for your loss.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%
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