PFS is good, or Quikrete All purpose is good too.. IMO sand is sand as far as getting into filters, you just have to clean and make sure your not letting it build up.
I promiss you those hob will be garbage in a few days. I have a bunch of lazy redtails and they still managed to kick up enough sand to ruin The shaft. If your local fish store knew anything they wouldn't of told you play sand. Play sand is fine if you like ruining filters and having a messy tank. Everyone on this thread is telling you not to use it.
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Just go with quickrete. It's cheap easy to find. Looks good. It's not concrete. It's not to dirty. Doesn't take to long to clean.
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