Am i feeding too much?

[quikv6]

As said above...you have nitrite, which is toxic to fish. You tanks' cycle has not completed. Managing this through frequent daily testing and water changes should be your main priority. That nitrIte has to get to zero and stay there. Then, you should see a presents of nitrAtes, which are not nearly as toxic.

And endure you have no ammonia, as well.

 

[RyanScanner]

New tank syndrome, not fully cycled + slightly over feeding + lights on too long.

 

[HUKIT]

All the above advice is very good but I’d like to ask what your lighting schedule is? Planted tanks need 8-10 hours per day but my display tanks are only on 4 hours. Too much light with excess nutrients grows algae, it’s a very simple equation.

 

[danotaylor]

HUKIT the OP mentioned in post #7 that his light is in 12hrs/day. He didn’t mention what type of light though

 

[LBDave]

Green algae loves light. I have one tank that gets a lot of sunlight and green algae is always a battle.

 

[FINWIN]

HUKIT the OP mentioned in post #7 that his light is in 12hrs/day. He didn’t mention what type of light though

at 12 hours it don't even matter!

here's a helpful link on information about how the light spectrum affects plant growth in aquariums. What combinations cause the fastest growth. Very useful to know if you have 24/7 leds that you can customize for less algae.

red vs blue vs green light
white light (combination)

Choosing the best light spectrum for planted tanks - The 2Hr Aquarist

 

[danotaylor]

Looking at the location of the algae, isolated to the left end & floor of tank, it seems that there’s natural light hitting the tank. I asked the question, but the OP has not been back in the thread since

 

[4D3]

Is that a qt tank? It's very bare...

You could try floating plants if you're worried about algae. As for the lighting, take some filter foam, put it up top and shade off some of the light. Adding some substrate and maybe some smooth rocks and silk plants will have the double benefit of adding surface area for bacteria and reduce stress for your flowerhorn giving it things to explore and rest around. And depending on the substrate if you go darker it will absorb some of the excess light that feeds algae!

Its a physics thing

dark colors absorb light/heat
light colors reflect light/heat

light and heat along with higher nutrients feed algae. Give it competition for nutrients.

I have floating plants! It was the lights, I overblew the time and density

 

[4D3]

The presence of nitrite indicates that your systems is not fully cycled yet. You may continue to have challenges until your system is properly balanced.
The quality of your filter & media really has no bearing on the algae issue. UVC works well when algae is suspended in the water column cause it kills it as water passes through the light column. Your algae is growing on the side & bottom of your tank so the UV will have little to no effect on it.
12 hours is a lot of light though. I would suggest no artificial light when you’re not sitting in front of your tank. Ambient room light is plenty for fish to do their thing when “home alone”.
Is there any sunlight hitting the tank during the day? The algae looks to be concentrated to the left end of the tank
You could add a bristle nose catfish to “clean up” the inner surfaces

You are all amazing! Thankyou! I screwed my lighting!

I gave it 3 days off and algea was gone

 

[4D3]

All of you are fantastic! Look at this little beast now!