I do not profess to be an expert however, from what I have researched 2 hp pump is too big for your spa. only so much gpm can go through your pipes. what size is the plumbing to the spa? how long is the run, how many 90's? etc. I might look into the Pentair Intelliflo -- which is a variable speed pump. my guess w/ a 2 hp pump you will be throttling way back which is just wasting energy making your pump work harder.