I am thinking of switching from salt water to a cichlid tank. My question is could i use the live rock from my salt tank in the new tank. If in recure the live rock in fresh water, it will kill anything that is on them. Need an opinion on this.
If it was me I would try to sell off your live rock, especially if it's cured you should be able to get a fair price for it, and then buy new rock for your cichlids. Depending on what species you want to have you would be better off with some slate or smooth boulders instead of a porous rock anyways.
All of the benefits that live rock has in SW it also has in FW. You will need to recure in FW before adding it to a tank with fish. Curing in a fishless tank would be a great way to fishless cycle. There is some merit to the previous reply, in that IF the rock is nice and IF you can find the right person you could sell it for enough to fill alot more space than the live rock took up.
I've heard of people having good experiences with http://www.holeyrockoftexas.com/ but I can't vouch for them...I was going to order from them but ended up buying lava rock from my local landscaping store instead. Since I ended up with 160lbs the price became very important and $0.50/lb couldn't be beat, plus the porousness of the lava rock should help hold bb like the live rock does in a saltwater setup