Dodgy rock??!!

[crackenhunter]

I put a rather nice looking rock in my tank about 3 or 4 weeks ago. I did all the cleaning, boilied it up, scrubbed it, boiled it again etc but I'm a bit concerned.

The rock itself looks like sandstone although recently I have noticed a sort of rust colour on the top of it. In fact it looks exactly like rust!!

Recently I have had problems with losing fish and I wonder if this has anything to do with it. So far 2 Mollies have died and I have a very sick looking Guppy.

Would the best thing be to remove it and if so does the tank need treated??

Thanks
James

 

[semper fi]

rocks with limestone shuld not be added to the aquarium. pour vinegar on it, if it fizzes do not put it into the tank. no matter how much boiling you do to it, it will not be suitable for the aquarium.

maggie