Pool filter sand can be rough, it depends upon the sand. There is also the colour aspect; most of it seems to be white, and this is something you should avoid.

I switched my tanks (6 of 7) over to Quikrete Play Sand and I have had no issues with it. It takes a lot of initial rinsing, but the end result is well worth it. Substrate fish (corys, loaches, and substrate feeding fish like cichlids) do very well with this; it is safe and pure. Plants grow well in it. And as a bonus, it replicates the sand in Amazonian streams so it is natural in appearance. And it is certainly inexpensive.