I use Eco-Complete gravel with mine. I do not use Co2, medium light. I'll dose with Seachem Flourish whenever I remember to. They would probably benefit from a root fertilizerWhat type of substrate do you use? I got these from a sandy substrate and have kept them in my 10 gallon tank that has a sand substrate but I added a few to my 75 gallon tank and I am using a small gravel type substrate. Any idea how these will hold up? Or advice on how to keep them healthy?