Ok so basically,my,Oscar passed away at 4 years due,to a tumor so I have a 75 gallon with 1 featherfin catfish and I added a a Jack Dempsey firemouth and 4 silver dollars am,I stocked completely now or is there anymore,room thanks for all replys

i would remove the featherfin as it's african in origins and requires completely different water parameters then the jack or sd's, in the long run you'll notice that sd's require alot of space, i had a group of 10 in a 160g and they still banged into stuff frequently. in a 75g you are pretty much fully stocked with a JD and the sd's, but given that jd's grow slowly, you'll have plenty of time.

I wouldn't add anymore fish. With just the SD, FM, and JD, you are already fully stocked.

+1 on the above