Can I use a money pool to collect money from customers?

No. Money pools are used to collect money from friends and family. All the contributions you receive through your pool are considered personal payments. They’re not eligible for Buyer Protection and all contributions received must be in line with the PayPal User Agreement and Acceptable Use Policy.
If you want to get paid for items or services you sell, you can send a money request or an online invoice, or set up your unique PayPal.Me link for customers to pay you back easily.