Builder just finished our pool 10 days ago. I'm disappointed in the amount of flow we are getting from our spa into the pool. We have 4 returns in the pool and one in the spa. We have a Hayward C-1750 cartridge filter and a Hayward heat pump. The pump is a Hayward Max Flo VS 1.5 hp. At the max 3,000 rpm I get enough flow to circulate the water in the pool, but the spillover of the spa is very minimal. It is basically a trickle. My filter is clean and I am not running any of the other water features. Any advice? Do I need a bigger pump? I am contemplating replacing the Max Flo to the Ecostar 3400 VSP. I want to be able to run my 24" waterfall, sundeck fountain and have flow over the spa all at the same time. Is this possible?