I bought some of this tonight. I didn't realize it needed special substrate to grow very good and it is in a tank with just sand and they are so pretty and the guy at the LFS said low light and easy to grow (which I also saw on many youtube channels / online) ... I have 2 quick question.... 1) Should I just use root tabs then to help supplement as the substrate is only sand and not nutrient rich. 2) I have a small dirted tank, if I got more, that would be a fine substrate right? Dirted tank capped with a sand / grave mix.