I haven't seen any post with this substrate, which I thought was quite common and relatively cheap compared to ADA and ecocomplete. I have used it before and plan on using it again in my high tech. I has a heater cable there is already old soil in the tank im just adding some more to boost and changing my gravel for silica sand. The reason I prefer the 1-2mm, but I am assuming this wont compact like fine sand? I understand it does not have phosphate and nitrate like ADA, but otherwise have any people tried it?