4 bulb t5 for trade or sale

[Pipes1234]

I've got a 50g display and a 55g sump .... The skimmer I've got now was given to me for free and I was told that it was garbage when I got it but that it would work until I could get better ... I'm looking for something that will do the job no issues .... I don't know much about skimmers aside from how they work I don't know the differences between models or which are the best or the most liked

My current skimmer