Crepe said:It isn't worth it. From my observations and the observations of others, heating your substrate does little to nothing for plants. I'd save the money and put it to a nicer light fixture. Also..for art shots and competition shots, having an immovable cable in your tank wouldn't be very satisfactory.
mfdrookie516 said:Everything I've read from well known experienced plant enthusiasts says that they are a waste of money
mfdrookie516 said:root tabs
Crepe said:I know a guy who's been sending out samples of tabulated gluteraldehyde. It's basically excel in slow release block form.
I've also seen what you've described. IMO they don't work well and are pricey.