Protein skimmer

[bonniewoodruff]

I have a 93 gallon cube with overflow to trickle, floss, bio balls, sponge, carbon, then protein skimmer. I bought this tank used and don't find any markings on the skimmer. It looks like a marineland from the ones I have seen online. It is not working well anymore so I am looking to replace it. Any suggestions on a good skimmer(that won't break the bank)? I have limited knowledge as this is my forst tank.
Thanks