Buying Live rock and Cycling questions.

I found a lady locally that wants to sell here sand. its 100lbs and has been in her tank for 3 years. Its a crushed coral sand mix. Should i buy it? and if so how much should i offer her?
 
No, I would only use new sand when setting up or moving a tank. There can be a lot of crap trapped in that sand, it will take a long time to clean out!

I would use old sand to seed your new sand with -- like a few cups here and there, spread throughout your tank.

I would also avoid crushed coral. That stuff is very hard to keep clean. Go with regular sand instead.
 
I would not, you are going to find you will want to change your structure around. But to make sure it is secure, rockslides are horrible in a tank.
 
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