Red slime algae

[pstuder33]

I have a 55 gallon, set up about 4 months ago and I'm starting to notice that awful red slime algae on decorations and the glass. I usually feed once a day or every other day. It is a non planted tank. I have a fluval c4 filter with purigen instead of carbon in it.
It's stocked with 15 neons
1 pearl gourmani
1 clown pleco
5 black skirt tetras.

Water:
0 ammonia
0 nitrite
>15ppm nitrate.

I also do 30%-50% weekly or biweekly depending on nitrate levels
Any advice is welcome to try to get rid of the algae before it starts to take over my tank. Thank you everyone

 

[biondoa]

You didn't say how long you leave your lights on. Cut down on light hours, lots of water changes and check your feeding. I know you said you only feed once a day or every other day, but the quantity that you feed is important too. The algae, which I believe is actually a bacteria that masquerades as algae, feeds on nutrients in the water (nitrates) and is also photosynthetic, so needs a lot of light. Since your tank is not a planted tank, lights only need to be on when you are wanting to view the tank, unless it is in a dark basement, or somewhere where there is no natural light.

 

[pstuder33]

Lighting is probably the issue, I've been turning it on when I leave for work and not turning it off till bedtime. Thanks for the help