Correct Procedure for Switching Tanks? HELP

[MitchM]

Yes you can certainly use the old sand and rocks (see my previous post).
Rinse the sand until the water runs clear.
After the rocks have been in circulating water for a couple of weeks, test the water they're in to make sure ammonia reads zero.

Seeding the new sand means taking a little of the old sand and mixing it in with the new.(just placing it on top is fine)

[ALang]

[quote=KushBubbles;586572]Few Questions:

- Is it old sand for another project possible to re-use my sand for another project, and what procedure if so?

The old sand can be re-used for other project, after it's been vigorously rinsed many times. You can rinse it in fresh water, after which the sand would be pretty "dead".
You can rinse it in salt water, but there still will be die offs, and expensive to do. And do expect a new cycle when the sand is used immediately afterwards, because no matter how well you have rinsed it, there'll still be dead and decomposing organisms. People sometimes just leave it outside and allow the sand to dry out. Anyway you look at it, it will no longer be "live sand".

---Can i still use the live rock that was in the sand?

The live rock should be rinsed in salt water and any black stuff scrubbed off. Again, using them would be Ok. As long as you do know and expect a cycle to occur. Careful with your fish, if you are moving them into the new tank. Test your water parameters often to ward off any major fouling due to die offs, do your water changes.

--And by seed the sand do you mean mix it in to the new sand?

I would just get a couple of cupfulls of your buddy's well-established tank (no medications, no diseases), and just gently pour that into you sand (lower the container first, or you'll have a sand storm that'll last for days). By doing that, you are trying to add some of his beneficial bacteria, & sand critters to your sand, hoping that they will flourish and reproduce. I don't think you necessarily need to mix it in. Either way, your tank still need to cycle. Just hopfully won't take as long to establish.
Good Luck.