Petco has some fine white sand for like 7 bucks per 10 lbs. I used a few in my tank and love it. Just make sure you rinse it gooooood!! Im still taking alittle sand out through my filters. I dont think super fine is good for gobies is it. Argamax makes a special substrate that will be great for gobies. It is a mix of fine, and simi-fine, lol. I put 40lbs of the live special grade with 60lbs of the super fine white from petco, and it has worked out great. Hope this helps. _________ 15 Gallon Nano, Current USA 80 watt PC Light, Pengiun HOB Refug, Pair of clowns one ocellaris and one purcula!
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