You can use it, no problem at all.
I used to have that one on my 30 gallons tank.
But those hang on the back skimmers are tricky and need to adjust and watch out for overflow in the cup.
I run a coralife 125 in the sump of our 75 gallon. It gets the job done and pumps out halfway decent skimate, but if I had the space/ money i'd get a reef octopus. The coralife is very temperamental and it doesn't take much to get it going haywire and overflow the cup
Do a search and you'll have your answer.I have had my share of skimmers and the coralife while simple was prone to constant inconsistent problems and I agree with what Bobbofin said...would overflow for no reason.Oh!! the micro bubbles and that stupid sponge... gotta clean it every day.....I'm done ...my apologies.