What solutions are there for wedding cake stairs that trap algae? I replaced my pool this year and when I pulled the stairs, I noticed a thick sludge inside the bottom of them. I struggled with algae last year and I feel like this was the culprit. I’ve read drilling more holes may help, but is there a recommendation on how many and where to place them? Or are there different wide stairs that I can buy that don’t have this issue? I have the king aqua stairs I’ve attached photos of.