sump

[psuedo]

I have run my tank now for almost 2 years without a mmajor problem in it. I have various corals in it, and most are soft. I have run it without a skimmer or a sump, but I would like to add one top it now.
Does anybody think that this may screw with the chemistry in the tank??

Also, I would like to build my own sump if possible. I have found various places on the web that will show me how to make it, but I am more worried about my inflow and outflow pipes. It will be coming from a 60 gallon tank. I have a mag 7 kicking around, and all the extra parts for the sump. Should I be using another mag 7 to keep the power the same, or is there another way to do this?

This is a question that I would like answered because I am uncertain about a few things, and I would hate to screw the whole thing thing up because I couldn't ask questions. It is also in reply to the boring thread that was posted, saying that there was nothing ever posted