I have 2 pool pumps that both have gone out a few days apart. Both were about 15 years old from what I can tell. We haven't had the house very long. The pool and slide pump are currently connected to Hayward SP3210X152BH with a Century HSQ1152 1.5hp. The water fall is also connected to a Hayward SP3210X152BH but to a Century SP3215Z2ME 2/.25hp. Now that I've give you all the details here are my questions.

1) I get okay performance from my Zodiac MX8 on a side port but I would like to improve it, would adding a 2hp motor to the pool pump improve the suction performance? (I understand the potential for increase electric bills)

2) 2.25 HP for the waterfall seems extreme. Do you think I could get away with 2 or less even? 

3) Obviously you can't see my configuration but what would your recommendations be for motors and whatever accessories that would involved such as seals. Thanks in advance from a novice your videos have saved me!