The manzanita will be okay for your pool.

But the real question is, "will the pool water (splashing, etc.) negatively affect my manzanita?.

The small flowers or fruits might get into the filter, which could be a bother.

The tree should do OK for you. The question you might want to ask yourself is am I OK with cleaning all of the leaves out of my pool? Personally I wouldn't put any tree within 25' of a pool.

Being an evergreen tree Manzanitas lose their leaves in the summer when you will want to use the pool.

I'm thinking that because the spot for the tree will be at one end of the pool, splashed water will be a minimum, and even if there is a lot, it should be fine.

I'm not worried about the flowers and little fruit, either. I have crapes and Roses in the vicinity and already have some petals that get in the pool. What really irks me is the 10 garbage bags of maple leaves that I pull from the pool every winter, from a 20+ year old silver maple in backyard. Fortunately, it's on its last month of life, as I am taking it out because the horrendous roots are eating my property.

P.S. I wish I had proof-read the title of this thread, because there doesn't seem to be a way to edit posts on this forum, once they're posted.

J Braun, I should have mentioned that this tree will not be very tall, maybe 6 ft. And, it's supposed to be a slow grower. I plan to keep it like a Bonsai, if it wants to get bigger.

That said, I didn't know evergreens "she'd their young in the summer". Does that mean they don't drop stuff in winter?

well actually most evergreen trees and shrubs can drop at least some of their leaves at ANY time of the year---they generally just don't lose ALL their leaves at any one point in the year---or they would technically be "deciduous". OTOH, just to show their are exceptions to this "rule" the California native coast live oak (quercus agrifolia) can lose most of it's old leaves in the spring (but then very quickly replaces them)--so go figure, LOL..