I have been running my pump & filter 24/7 for like approx 2 months. I started SLAM 3 days ago. When I check my skimmer basket it seldom has much of anything in it except for when I vacuumed. MAJOR algae issue, been following SLAM but I seldom see pressure gauge go up much either. I backwashed just before starting SLAM to help ensure starting with a clean filter. I've seen video's online where when looking at the skimmer basket you can see the water almost in a vortex like when you pull the plug on a tub. Mine I can just barely see anything moving down the pipe.