Ocean gravel for a freshwater tank??

[namibia]

I found a beautiful looking gravel on the Maine coast and thought it would look great in my 44 gallon freshwater tank. I washed it well in fresh water, screened it to get rid of all small particles, then boiled it for at least 15 minutes before leaving it sit in fresh water for several days. I have tested the water it is sitting in and no negative changes in PH, hardness, chlorine, or alkalinity are seen.

Do you think it is safe to use it in the tank???

Thanks & regards

 

[Crepe]

Yep it's probably safe then. If it's not calciferous it should be good in most cases.

 

[BigJim]

+1 I might perform the vinegar test, just for a little more peace of mind.

 

[namibia]

Vinegar Test??

Please explain.

 

[mellawson]

put a little vinegar on the rock no bubbles no problem.

 

[Sum22]

Pour vinegar on the rocks. If it bubbles, then the rocks are not safe for the tank.

 

[namibia]

Thanks, I will do that.

 

[CA_BroncoFan]

While i do enjoy the vinegar test i would also suggest using ph balance on your rocks..a few drops to make sure there is no fizzing. I read somewhere and was told by my lfs that the ph balance actually is better than the vinegar. Just a thought but it seems like your already headed in the right direction and i would love to see some pics of it!

 

[BigJim]

I believe pH Down would be the stuff. It's just a stronger acid than vinegar.

 

[CA_BroncoFan]

right thats what it was ..haha nice catch thanks

 

[namibia]

Thanks, I saw no problems so I cleaned the tank and added the new gravel.