The pump that came with my Coleman power steel pool was tiny and didn’t seem powerful enough to manage the 18’ round pool. After investigating recommendations I went with the Intex SX 1500 Krystal Clear Sand Filter Pump… after installation, a light stream of water seems to be flowing back into the pool but it doesn’t look like much, if any, water is being pulled in through the I water inlet. I re-read the instructions three times, looked at YouTube videos, I’m at a loss. Help?! Attached are photos. Just trying to get a backyard pool going for the kids but didn’t expect the pump situation to be so complicated.