Saltwater rocks in a freshwater aquarium
 

I got some rocks recently from a rocky beach and was thinking about putting 1 or 2 of the nicer ones in my aquarium.

Does the fact they have been in salt water make them not advisable to use in a freshwater aquarium?

Exactly what type of rocks are they? I wouldn't use them as it will most likely raise your ph. If you're keeping cichlids that might not be such a bad thing but if it was me (and it's not) I wouldn't do it.

if you got them from the beach it would not be good to put it into your tank because it could give off the wrong kind of minerals

ok thanks...

I got 4 large gold fish and they are doing well after a long journey after moving house so I want to keep it that way...

How many gallons is your tank??

Haha kymmie you know that whatever his answer is it will be too small for 4 large goldfish :P

I know, I know. I was hoping to hear that he had 36 gl per goldfish...:|

depends on the rock type ,any non-porus rock types can be well scrubbed and used eg granite,slate,quartz,flint,basalt
avoid linestone,chalk,coral,mudstone etc

its a 30litre tank...

I suppose when I mean large goldfish, they are all about 4-5" long

And when am mean rocks, they are actually stones...