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:
I have a custom made Deep sea aquatic Aquarium
glass tank with overflows. The tank is a Peninsula
i have 7 goyder river rainbows for sale at 5
dollars each. they range from 3-4 inches in
length. the ...