Filter flow won't move it unless you directly blast it, also easy to do if you refill the tank too hastily. Hills compact easily over time, mixes with sand easily. Some plants are a bit of a pain to keep down, initially, like most light or fine subs other than sand. Other than that I like it, looks natural. My bottom feeders don't really mess it up, but I guess they're probably contributing to what I already mentioned. CEC is one of the highest.
You should buy it simply for the fact that it's hard to come by and cheap, you probably won't regret it.
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