changing out tanks

[TheReefGeek]

I have moved my large tanks more than once, and never had any problems.

I have always rinsed the majority of my substrate really well, but kept some untouched to seed the rest. You lose a lot of the life in your sandbed, but I like getting rid of the gunk build-up in my sandbed while I can.

If your tank is only 3 months old, I don't think it will matter much either way, you probably dont have a lot of gunk OR life in your sandbed yet, so it shouldn't matter.

Because you are doubling your water volume, I wouldn't worry about it. And your bacteria in your rock, assuming you have enough rock, should support your life well enough without the sandbed.