Need help with algae issue, please :)

[catmel]

Hi everyone It's been a while.

just looking to see if I could get a bit of advice. I have a few things to try yet, but I'd like to see if anyone had any other advice that might help.

I have a 55 gallon just begining reef ( only 3 small polyps) with a 2-3 gallon HOB fuge with culerpa ( had a small amt accidently mixed in with chaeto I found out - from the lfs, it kind of took over the chaeto)

I have only a handful of snails, maybe 3-5 hermits, sally light foot crab, emerald crab, 2 peppermint shrimp, a scarlet skunk cleaner shrimp, and a tiny tiger serpant star. My livestock includes a small frag of watermellon mushrooms, small frag of zoos, small frag of green star polyps as well as 2 common clowns, a royal gramma, small coral beauty and a small juvie yellow tang ( I know about the tang, please stick to the question asked)

My lighting is 2 x 96 watt PC 50/50 bulbs.. they were a year old, replaced them today with brand new bulbs. I also have metal halides which I dont keep on at the moment.

I also have a coralife super skimmer 65

My problem being is I cant seem to keep control of the green hair algae. It grows constantly on the rocks. I've also recently have been having problems with cyanobacteria ( red slime algae) I'm a bit frustrated.. need some advice on how to control it better.

tank stats: temp 78, SG 1.023, ph approx 8.0 earlier this am, ammonia - 0 to trace ( I think my tests may be getting old.. it wasnt completely yellow but didnt reach 0.25) nitrite 0, nitrate about 5-10ppm, looked like trace of phospate, calcium 400ppm, carbonate hardness 143.2 ppm gh/kh

I'm thinking this may be related to me either a) feeding to much or b) possibly the old lights ( may see improvement now??)

I generally feed seaweed flakes + either quarter of frozen or a pinch of pellet once a day

Any help greatly appreciated!