I'm looking for someone to take care of regular pool maintenance for my mid-sized backyard pool. Tasks include skimming debris, vacuuming, brushing walls, checking and balancing pH and chlorine levels, and ensuring the filtration system runs smoothly. It would be great if you can also inspect pumps and replace small cartridges if needed. I prefer eco-friendly products and a service visit every two weeks during the warm months. Please let me know approximate duration for each visit and any prep I should do beforehand (e.g., cover removal or pool toys to clear).