new skimmer ?

[mycat99]

hello i am looking to get a new skimmer for a 120 gallon tank with 30 more in sump i have only 25 inches of height in base and run my sump between 4 and 9 inches deep i now have a aqua medic t1000.i have 3 triggers 3 tangs and 3 other fish with a bunch easy coral .would like spend no more then 500.00