Serendipitous Seed Starter (Aquaponics)

Below is my 125Gallon indoor fish tank for my overwintering aquaponics Tilapia (waiting to go out for the summer growing season).  I keep the water at 80 degrees F.  Notice how that turned out to be an excellent bottom heater for my seedling tray.  Those are tomatoes, soy beans, long beans, and luffa gourd seedlings.  Germination took 2-4 days (specie dependant).