using old base rock.

[justgotwet]

i have some old base rock that i bought around 10 years ago, it was in saltwater for about two weeks. if i use this rock will it cause a mini cycle in my tank that has been up and running for three months.:neutral:

 

[mayday610]

Anything you add to your tank in some way, shape, or form is going to go through a little cycle. It really all depends on how much you are adding to what size tank, and if the rock is "clean" I'd give it a good rinse and a scrub if its been sitting around. Chances are that sitting for 10 years it just needs a good cleaning first. If in doubt, just give it its own cycle in a plastic tote bin or something for awhile. I always have rock laying around here and there from tanks past. I'd had great results by just giving them a good soak and a scrub/rinse before i put them in my tanks. If there is nothing on/in them to polute your tank and you are not adding a bunch at a time, by volume compared to tank size, in my experience you will be just fine. A three month old tank should be able to handle it.

 

[justgotwet]

Thanks that info helps alot. My tank is a 20g long.

 

[marvelousone]

I boil mine then add one peice at a time and wait few a week before adding another.