Can you also check how much DC a recording has?

No, there should be non, or extremely little only.
Small amounts of DC are of no concern.

But - depending on the transfer conditions - pickup/tonearm-tuning, discplayer, RIAA amp, disc condition - there can be significant amounts of subsonic noise.

Usual practice is, to lower subsonics with a 20 or 30 Hz HighPassFilter.
This filter should have a soft slope like 6 or 12 dB / Oct., to avoid audible bass smear caused by phase shift and filter ringing.
DON’T use so called Linear Phase Filters!
These have very unnatural pre-ringing.

The filter, as a side effect, removes possible DC too.

Metal,

Q (Quality Factor) refers to the Width, or Selectivity of a Filter.   Ex:  A "Low Q" filter is quite broad in the range of affected frequencies, whereas a High Q filter is quite narrow, and affects a much smaller range.   Your Izotope's option of Q 1.0 is probably just fine for defeating subsonic content in your Vinyl Rips.

To give yourself a visual representation of "Q",  create a generic filter in your RME's EQ.   While looking at the Bode Plot display, adjust 'Q".   See how Q works?

Have fun!

Curt

Cool, thanks! Last question: I assume if I need to use high pass filter option I need to do this first before using something like Declick or Normalize?

First declick.
Then decide to filter or not.
Normalize comes last.

Normalize the whole album with the same gain value, to preserve the original level relationships between the tracks.

Got it, thanks for the quick responses

In general, don’t use filters if you don’t have an according problem.
Every filter in the audio band reduces sound quality.

These mentioned figures, 1793 Hz and a Q of 1000, don‘t make any sense.
Please look again.

What might be meant is a Notch filter to remove mains induced hum, typically 60 Hz in USA and East-Japan, 50 Hz in Europe and almost all the rest of the world.
See this map:

If you have mains hum it’s way better to remove the source for it, usually it’s a missing ground wire from the disk player to the RIAA amp.
A filter for this audibly reduces the sound quality.

Another filter that is to be taken into consideration:

The typical Vinyl rumble filter (High Pass Filter) is 30 Hz, 12 dB / Octave; or 30 Hz, Q: 0.7.
It‘s only needed if the disc is warped or your tonearm / pickup combination is wrong tuned, which unfortunately is quite often the case.

It‘s intended to reduce subsonics that origin from the typical vinyl’s mechanical imperfections.
You can see the visibly shaking woofers of your speakers at louder playback if those frequencies are present.

Very often RIAA amps have this filter built in, fixed or switchable.

Thanks for responding, I want to figure out what the "Base Frequency" setting is. When I click on D-Hum it brings up filter options such as "Adaptive Mode" "Filter DC Offset" "Linear-Phase Filters" "High-Pass Filter" "Low-Pass Filter" and "Base Frequency"  The Base Frequency does not have a box to select or unselect, it just has selection of the hum-base frequency "Free" "50hz" and "60hz". The default setting was set at Free with Frequency hz 1793 and Filter Q  1000. I assume it is going to be used with the any of the selected options I choose.
I have the High Pass Filter set at Frequency [hz] 30 Filter Q 0.7

I haven't used any filters but just wanted to learn more about the filters incase I needed to use them. I think my set up for recording my albums is pretty good and my vinyl collection is in excellent condition.