Thank you

and should I just start water changes when the nitrates start to rise?
I added the startup amount this morning and put my established Pleco in along with a small diadema cichlid that was getting bullied. I wanted to try it out on them first. Because I’m getting a shipment in tomorrow of 2 Blue a caras and 2 EB jack Dempsey’s that I want to add straight to that tank so they don’t get bullied in my other. This is their tank anyways.
Was going to test water tonight as long as my two fish were still alive