Undissolved salt in new aquarium

[deeze]

I'm finally filling my 70 gallon tank and my brother gave me some salt he had from about 2 years ago when he had a marine tank and about 5% of it will never dissolve. The salt was in a big sealed bag from Instant Ocean and looks very white and pure. It just keeps floating around in the tank. PH is good, temp is around 80 deg., and everything else seems ok. Any ideas on how to get it to dissolve or remove it?

Thanks,

[aquaman67]

A powerhead to move it around will help. Or if you have one of those paint stirrer things that goes on a drill that has never been in paint would work.

If you have niether, get a wisk or spatual and stir the water vigorously by hand...

[AquaDiva]

How long has it been in the tank?...Give it some time. The stuff is kinda old and it may never totally dissolve. Is there anything else in the tank besides water. If not, I would let it settle, (turn off all pumps, etc.) and siphon it out. :)

[aquaman67]

Originally posted by AquaDiva
How long has it been in the tank?...Give it some time. The stuff is kinda old and it may never totally dissolve. Is there anything else in the tank besides water. If not, I would let it settle, (turn off all pumps, etc.) and siphon it out. :)

My IO salt is over two years old and it still dissolves...

[Rodeo Clownfish]

When I first put salt in my tank two and a half months ago (Oceanic) some of it didn't disolve for several days, so I just caught the solid bits with a net and took them out before the rock arrived.