Whats up with my rock?

[TheOscar]

I've has these river rocks in several tanks in the past.. Recently that have like rust on them.. I removed,, just wondering what causes this

 

[BBradbury]

Decorative Rocks in Tanks

I've has these river rocks in several tanks in the past.. Recently that have like rust on them.. I removed,, just wondering what causes this

Hello The...

I use the vinegar test on the rocks I put into my tanks. This one may not be safe to use. Let the piece dry. Then, put a few drops of vinegar on it. If there's a reaction of any kind, then don't use it. If there's no change, then rinse it well and if you want, put it back into the tank.

B

 

[TheOscar]

Ok, will do. I'm assuming some rocks have higher metallic properties ? I'm really loving pulling from nature , I know it's risky , but there's something about using natural decor you've found.. Anyway.. Thanks for your help

 

[Delapool]

Is it magnetic (eg with a kitchen magnet) or heavy for its size?

 

[TheOscar]

Nope, feels like all the others.. They all came from the same place

 

[Delapool]

If there was a lot of iron I would expect it to feel quite heavy. If it was metallic or magnetic this would be the case.

Hmm, I had wondered if it was iron rich and this was rusting out - is it only on the darker rocks? These would be more likely to be iron-rich.

 

[TheOscar]

Actually it is in the darker ones.. I'm just going to toss them and find more.. Kind of silly to take a chance over some rocks .. Thanks

 

[Delapool]

Makes sense - never short of rocks