Hi! We had our sod installed early 2018 and I'm not doing a great job of keeping it healthy. I'm not sure what I need to do differently. Please see the attached pictures to get an idea. In summary, I feel like I have thatch, or some layer, that is preventing the entire sod to grow strong. I have applied Milorganite fertilizer twice this season. I did one application of a pre-emergent in Spring. Last season, I used a different fertilizer and did use a weed killer sprayed via the garden hose. I get bind weed and thistle in the sod.I recently installed a Rachio sprinkler controller and have the schedule set per the recommendations. It is currently doing 28 minutes per zone 3 times per week. It appears that the soil is clay loam, where I live northwest of 66 and Hover. I typically mow at a higher height but when I do, I barely get a 1/5 of a bag of clippings. Much of the grass never even grows to a height for the mower to clip it. I plan to do core aeration next month. I have not core aerate before. I don't know if I should power dethatch. I'm happy to provide any more detail about what I have done so please let know what you need to know.