Swimming Pool DE Filter Pressure Fluctuates? Hello, the pressure on my Nautilus 7A FNS48 DE filter changes...

Hello, the pressure on my Nautilus 7A FNS48 DE filter changes every couple minutes between 0 and 13 PSI. After I start the pump, it unhurriedly reaches 12 or 13 PSI. Then after a minute or 2, it dropes to close to 0 PSI. Then the pressure builds up again to 13 PSI. It go on in cycle similar to this. At the same time, I hear nouns bubbles coming out of the water outlets surrounded by the pool. Anyone know how to fix this? Thanks a lot.
Thaw underground dampen pipe?
Answers:    You enjoy air getting into the system. Make sure your pool is full plenty that the skimmers don't suck air. Also gross sure your basket lid is tight. Open your spigot on the filter until water comes out. next watch the pressure. Make sure adjectives of your valves are spread out.
Spa electrical?
Turn the unit stale, check all connections tighten where on earth necessary. It is sucking nouns into the lines. Make sure to bleed all nouns before turning rear on.
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