James Croney Posted January 28, 2022 Share Posted January 28, 2022 https://www.ebay.com/itm/185181577315 So i was looking for some substrate for a small tank, and came across these things. They are twice as expensive as normal gravel substrate... and take forever to ship, but I think I am going to get some and do the vinegar test and stuff on them to see if they are safe for the fish. Maybe i can get some really sparkly ones for a few bucks more... Do does anyone have any suggestions as to what to try to prove their safety in the water long term? This obviously isn't practical for larger tanks, but a small 5-10 gallon tank might be neat. Link to comment Share on other sites More sharing options...
DaveO Posted January 28, 2022 Share Posted January 28, 2022 No reason to believe it is harmful that I can see. I think you should try it and show off your tank. Looks kind of neat to me. Link to comment Share on other sites More sharing options...
Guppysnail Posted January 28, 2022 Share Posted January 28, 2022 I doubt it is harmful. Vinegar test. The stuff they are polished with sometimes leave a coating put in a bucket with really hot water and swish vigorously. It may bubble a bit. Rinse with hot i sometimes use boiling water on gravel etc to get all the residue off. Link to comment Share on other sites More sharing options...
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