美国采购需求：水疗池过滤器、热水浴缸过滤器、泳池过滤器、青蛙过滤器、Hayward泳池过滤器、Pentair泳池过滤器

I recently purchased a filter set from eBay, and after the initial cleaning, I've noticed the psi has increased by 5 compared to before. The only chemical used was shock treatment, and our pool technician mentioned that the filters seem to be underperforming. Given this issue, we would like to request a replacement for the filter set. It's important for us to ensure proper filtration for our pool, and we hope to resolve this matter swiftly. Thank you for your assistance.