New here

[Steve'o]

Hi Everyone
I am new here and looking for some advice and help.
I have a jbj 28 gal nano cube that I setup a few moinths back. I have a fair bit of coral and live rocks in it and a few fish. Also about 6 snails and a slug. Though they would help me with my algae problem...??
I am doing a 5 gal water change once a week and trying also to suck up any debris on the sand floor... my tank is an algae magnet.. seems like I am cleaning it every single day. Is this nornmarl?
I bought an Protien Skimmer as i was told this would help. but does not fit behind the tank so I have to have it inside the tank and the top just barely fits under the lid of the tank so not sure if this is even going to work.
I am testing my salt levels and they look good to me.
Temp is good I have a heater.
How do you keep your tanks so clear?
I want that.. please help?
Steve'o