Any Electricains on the Board?

[dbdavid]

I am planning for my new in wall tank in the basement and went to see how much space I had in my panel. Low and behold it is full minus one 15Amp slot. The main breaker is 100Amp.

I would like to put in a small sub panel in the fishroom with say 2 - 20Amp circuits and a couple 15Amp circuits.

Can this be done with the main service that I have today?

I will be getting an electrician in to do the work but wanted to know some options before getting an estimate.

Thanks

Dave