Hi Mike,
Wow!! I didn't know Sequence Primer and Wave Dragon are also whisperly quiet. I am going to do some comparisions on electricity usage and pump rate to see what's the differences. there are prices to consider too.
Good point about the swimming pool in-wall skimmer. I didn't think of the flow rate. it definitely something I need to think thoroughly before installing one.
regarding matala rolls in settling tank, I kind of suspecting some solids might pass through black matala. that's why I was planning to have a green matala roll on top of the black matala roll but now I can change them to blue. thank you for sharing the experience.
I do have a question on your future plan of changing from current setup to 1 blue and 1 gray rolls. would that clog up?
thanks for the comments/feedbacks!
Steve