Ok, I backwashed again, filter went to 10psi, pump to 1900 rpm, 16gpm, and 400watts, and I had already bled the filter air until water streamed out. Pump read filter at 0%. After 20 mins, the filter was at 13psi, 2100rpm, 16gpm, and 520watts and 13%. I opened up the filter valve and there was...