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Plenums revisited/substrate heating
I was thinking about adding a plenum to my next setup. In the prior
posts I saw discussions about nutrient dosing and nitrate control. I was
not thinking of either of them, although the nutrient idea sounds
interesting. But I was thinking as a substrate heating alternative. I was
thinking about placing the ballasts in the stand, centered, a few inches
bellow the tank bottom. I would imagine this would setup some thermals in
the substrate and hopefully provide a slow current to carry the nutrients
through the gravel laterite mix. It would also mean a sealed plenum, no
uplift tubes. And I figiure the plenum could be seperated from the gravel
with a thin layer of sheet floss.
What do ya think???