This template is a starting point, not legal advice. Contract and consumer-protection rules vary by state. Have a local attorney review it before you use it, especially the liability and auto-renewal terms.
The clauses that prevent the most disputes
Chemicals: included or billed?
Pick one model and say it plainly. "Chemicals included" is easier to sell but needs an exclusions list (algae recovery, phosphate remover, salt, extra stabilizer), or one green pool wipes out a month's margin. Section 2 has both options. Delete the one you don't use.
No access means the visit counts
Locked gates and loose dogs are the most common reason for a missed visit. Section 5 makes the visit count as completed when you can't get in, which stops "you didn't come this week" credits.
A repair approval threshold
Section 4 lets you handle small fixes on the spot and needs approval above a dollar amount you choose. That's faster for both sides than calling about every $20 o-ring.
Rate changes with notice
Section 3 reserves the right to change the rate with 30 days' notice, so a yearly increase is something the customer already agreed to. Pair it with the price increase letter.
Getting it signed
Print it, or paste it into any e-signature tool. Keep the signed copy with the customer's account so anyone in the office can find it when a question comes up.