New Setup with Flourite Black Sand
I'm new to this forum and setting up planted aquarium. I've got a 5gallon tank and want to setup a heavily planted low-tech aquarium. Already got Flourite Black Sand as substrate. I've read that leonardite is a good base for planted aquariums, but apparent I've got a liquid Black Diamond Leonardite from amazon which does not seem to be suitable for aquariums.
Can anyone suggest from where to get solid leonardite or any other alternative?