Hey guys, got a question. I posted a question but in the commercial mowing section, (I wasnt even thinking to put it here). Ok, I installed a flagstone patio (my first one) thank God its at my own place lol. The pattern came out really nice and I used nice flat boulders for the front base of the patio, I used a base and about 2" of sand to lock the stones in. I'm afraid the sand is going to wash out before long between the front boulders. What can or should I do to ensure that doesnt happen. Thanks in advance.