Hi I am a new pool owner of which this is my first pool ever and i have been having it now for about 2 months. I have a Jandy JEP2.0 Variable speed filter pump and I am currently running my 25,000 gallon pool 11hrs 20mins a day at 1750rpm and 40mins a day at 3000rpm (When Cleaner is On). When I run my pump at 1750rpm my cartridge filter gauge reads 0 psi. Is this correct or should i be seeing some type of resistance reading from that gauge? When i put it on 2450rpm it reads 10spi and when i put it on 3450 (Max) it reads 20psi. Everything seems to be working fine but is it normal to have 0psi reading on 1750rpm and is it effectively filtering?