125Gal start up Need some addvice

[blacknife]

Look at some of the other big tank builds in the tank journal threads and see what they have done and what kind of results they get.

There will all ways be upgrades. You either shell out to get all the good stuff at the start or start slow and low tech and upgrade what you need when you realize you need it.

I started without a sump on my 33 but i did not put it on a stand. when i decided to upgrade the tank i ended up buying a used rig and moving everything. Leave room under your stand that you can make a use of a sump if you change your mind later, when you get sick of looking at all your equipment hanging into the tank.