Which do u ppls think is a better way to heat a 20 gal aquarium
With water and an aquarium heater.
-adam
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"The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing."
- Anna Sewell, author of Black Beauty
A peice of flexwatt or a under tank heater will work well for a 20 gallon. Depending on your room temps you may or may not need any heat from above to raise the ambient temps in the cage..