i cant exactly remember my parameters last wc but the spec gravity was low something like 1.018 or somethin like that. The nitrate and nitrite are always much higher than they are supposed to be and i always have a 7 point something PH. sorry about that i really cant remember any specifics and i just ran out of the other test strips (whicj is why i asked everyones favorite)
And about the canister filter it really annoys me because i clean the thing down to the wire and literally in about 3 days it completely cluttered with filth all over again. The tubes running back up to the tank is the worst. they are almost impossible to clean because they have these little indentations basically all the way up and all this crap gets stuck in them and it is a nightmare trying to get it all out it takes usually over an hour. and like the canister it goes back to normal in about 3 days
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Before you worry about the other parameters, you got to get SG correct. If your down around 1.018 your low and will need to boost it. Getting a refractometer to measure SG is highly recommended.
With out specific reading, it's tough to give advice. I will say that if you have a nitrite reading other than 0, you have some problems. For the hobby grade thest kits I like Elos or Sailfret. If money is no object then LaMotte, but there are lab grade and cost a bundle.
Get yourself regular test kits and do your own testing. Test strips can be a quick check, but are useless for actual parameters.
What brand and model of canister filter do you have? That can make a big difference. Pictures can help.
How much live rock and live sand do you have in the system? This is a big part of the biological filtration system.