Just picked up a Berlin Air-Lift 90 Skimmer for my 75 Gal. I'm just getting into Reef Keeping. Tank has been up for 8 mos. Only maybe 40Lbs live rock, 4in live sand bed, and 1 Yelow Tang. Is this skimmer ok for my tank or should I go eith another brand? Picked it up at PetsMart for $50.00. Good deal or no?