Not necissarily. The heater could be a slow leak of current. I really dont think its the heater but it has happened to many an aquarist. The hornwart is a floater but you can also strip it and have it be planted pine trees. Like this:
Two stacked aquariums available for local pick up
Fully equipped with lights, covers, penguin ...
I am in the label printing business and I have a
salt water aquarium. I cam up with these labels
Welcome to Aquarium Home Farm Center, a
professional breeder of the Dragon Fish, the Asian
Red Arowa ...