The idea of the river rock is a good one. We have quite a bit of landscaping around the pool and the previous owner had mulch in it. As you might guess...the Oklahoma winds does a FINE job of blowing it into the pool. Thankfully, it's not dyed...but we will be replacing it with river rock in the near future.Frans,
Glad to have you as a new member and welcome aboard!
We went down this road with two large tree planters at pool level and built into the deck at one end of our pool Mulch went everywhere when the wind kicked up. Also some of it was soaked with a dark ink that James referenced... got all over the coping and made a real mess. You may want to consider what we did. We dug up all the mulch and placed a gardening membrane then replaced the mulch with decorative landscaping rocks. Costs a little more but no annual replacement needed and no drips. no runs, no errors!
I hope this helps.
I'm a fan of this idea. It works really well for us. We used Big Blue Liriope. I mow it once a year in March with my mulching mower. I planted plugs on 12" centers and it has since formed a lawn that even handles the dogs rolling in it occasionally. You can see it below on the far side of the pool. It's 1' - 4' wide depending on the area.How about using a ground cover plant instead? Dward mondo grass for example... or a bazillion other low growing, maintenance free plants that grow low.