Upgrading Tank need lots of help Please

Okay I'm going to tell you what I have, My main tank is 2 1/2 months old 29 gal Salt Water Tank, 3" live sand bed. 20lbs of live rock. A 10 gal wet/dry with 10 lbs live sand, Protein skimmer is big enough for what I want to do. 500 gph return pump. 6 gal Refug with 15 lbs of live sand 10 lbs of live rock. I have a 75 gal Fresh water tank with 80 lbs of sand in my living room. Now I want to move everything from the 29 gal to the 75 gal, Turn the 29 gal in to the wet/dry and the 10 gal in to the refug. Okay I have 27 diffent kind's of coral in the 29 gal and I want to move it all to the 75 gal without cycleing the 75 gal tank. Can that be done if I move all the sand, rocks, and water from the old system to the new 75 gal tank. I am asking because that would be like 80% more new salt water added to the system. Everything I have, lights, skimmer, pump, power heads are all enough for the 75 gal, I kind of over did the 29 gal tank. Ive never changed s/w tanks over so I need some input on this and how to do it. Can I use the sand from the fresh water tank?
Thanks and Have a great day..

 

I would recommend not using the sand in the FW tank for 2 reasons 1) its probally not aragonite sand that sw systems use, and 2) all the FW bacteria are going to die off when you add saltwater and cause a spike.

since your current SW sandbed is only 2.5 months old it probally is ok if you wash it really good in salt water before putting it in new tank.

if you move all your rock and wash the sand well then it should be ok.

 

are you talking about washing the fw sand?

 

no, im talking about washing the sand from your current SW tank. to clean out any deterius or other nasties that come out whenever you disturb a sand bed.

i would just get rid of the FW sand all together

 

Just make sure you wash the sand with saltwater.

 

okay is there anything elso i should do?

 

Have fun of course!

 

so the sand is the only thing i need to do the right way.

 

can my tank have deterius or other nasties that bad after only two a half months of running?
i only have two little fish a clown & green spoted mandran.
but i am more worried about the corals, 27 diff kinds ant cheap,now dont get me wrong i dont want to lose the fish either,just more worried about the corals making the change.

 

bimp