Well my first posting here. I bought a friends 55 gallon saltwater set up. It has an over the tank filter. Not sure the size at this moment as it's in the other room. When I got the tank all was perfect so... I need to ask her exactly which light I have, etc. Seems to be LED. Like I said all has been great. I wanna buy a fractometer, skimmer and maybe new air pumps. Can't afford a sump and all that stuff. My one problem so far is algae has exploded. I ordered a test kit as she didn't have one. Will tests as soon as it gets here. Have snails, hermits and a shrimp. Had two one seems to be gone now. Not sure if it's hiding or died. She had the lights normal during the day and all blue at night. I am thinking of going 8 hours and dark at night. I did also order some pura filtration pad, boyd pure chemi blue and API reef master test kit. Should I buy something to kill the algae? I am also waiting on salt and will clean the algae right before the new water change. I do wonder if it was a good idea getting a tank already established THEN learn on the job. LOL Any advice on the algae or just plain advice would help.