Re: Aquatic Plants Digest V2 #415

Olga, re heater placement:
You're right on target with two as opposed to one heater use; more even
heating, less potential downside in the way of one//both going haywire or
heater failure. For tube-type heaters the best location is near the bottom
(even horizontal), but not under the substrate or otherwise blocked for
thermal distribution... this coupled with your source of water movement.