Just curious--I've been sticking jobes plant sticks down there periodically for the last six months. The plants seem pretty healthy--is this the best/only indicator? More importantly, I don't want to overdo it...how frequently do you replenish your root tabs?
Tank: eco-complete substrate, 6 months old (has it been that long already?), only fertilize the substrate, no CO2, most plants grow emersed.