Spare parts

I just took down my freshwater 10 gallon and am going to convert it into a sump for my 29 Gallo. Saltwater tank in the next month. I already converted the hang on filter into a fuge and was wondering if I could do anything with my air pump seeing as though I'm not using it for the 10 gallon anymore.

Not really, they arent very helpful in saltwater tanks. They mess with the pH and cause salt creep

I also have a bag of odd parts I found and was curious of what they went to. Can anyone identify what they could have been parts to? I found them in an open bag inside a bucket of fish supplies I obtained.