Hello, TFP -
I have been searching the forums and see several threads related to this topic, but looking for specific guidance. I converted to a DE filter this spring and have been on the TFPC method for 3+ years. Water is very clear but having some trouble with the circulation. I will see low intake/return but the psi reading is low (<5psi). If I "bump" the filter and turn the pump back on the flow will return and the psi will remain the same (<5psi). Eventually though the poor circulation returns. What causes this? It's frustrating as a few times i a have gone out to the pool to find that there is no circulation. I saw some other posts mention air intake but I only see a small bubble in the pump reservoir and no bubbles in the return jet. Perhaps the baseline psi of <5 is off to begin with??