
A pressurized sand filter always contains different layers of sand, going from relatively fine sand on top to coarse gravel as a support layer. In between the use of 2 more particle sizes is common.
Frequently asked questions
For full details on returns, refunds, eligibility, and timeframes, please refer to our complete Refund Policy here:
👉 Refund and Returns Policy
If you are unsure whether your item qualifies for return, please contact our team before sending anything back and we’ll be happy to help.