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What kind of light is it? Power compact? As to your issues with algae it could be a number of things. The light has a lot to do with it but increasing light never makes algae go away, curious to know why you would consider/think that. How many lighting units were you using over the tank? You said you removed one. Does that mean there was a separate unit, or are there two bulbs in this light and you took one out?

I’ve got so many questions after looking at these pics- How old is your setup? I see brown algae in there and other filamentous algae as well…BBA on your Anubias…all signs that your plants are struggling. If you are using aquasoil then you will have ammonia present especially in the early stages. But regardless, focus more on what it take to grow healthy plants. A lot of the plants we have in this hobby are low light plants anyway. I would trim back all the leaves that are affected by the algae and do some serious tank cleaning and water changes. Do you know how much co2 you are getting into the water column? Are you using a pressurized system? How are you adding additional nutrients? What is your filter? What size tank is this? 10gallon? CO2 is essential to photosynthesis, but it is not an algaecide, so you may get some responses here telling you to turn up the co2. You could but I‘d turn down the light first so you can catch up and get everything back on track.

But to start, I would do a serious serious trim and cleaning of your tank. Any of those leaves with the bba on them look pretty far gone and are just contributing to your problem. Can you take your driftwood out and scrub all the algae off it as well? Your plants all look like they are struggling. I would clean and remove all the algae that I see and Then readdress your setup. It is going to take some time for your plants to reacclimate and get back on track, but remember the more light, the more demand for nutrients. So turn the light down and start fresh. I run my light, which is a lot more powerful than yours, at around 10% intensity. Plants like anubias and Java ferns love lower light. so it’s important to understand the plants that you have and the types of lighting conditions they prefer. That goes for their placement in your scape too. Keep an eye on your plants and they will tell you what they like, but it takes time and patience to see them do such. Be patient. So many lights sold in this hobby are way more than adequate at growing plants that are available to us. But we rarely need them at full capacity, especially when over a smaller tank like yours. It can be a quick recipe for disaster.
 

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Ok thanks for the info. Great that you are getting a lot of responses. Having two units over your tank was a huge contributor for the algae explosion. There are a couple additional ways of reducing your light further if there is no dimmer etc. You can use mesh window screen over the top of your tank or cut out a piece and attach it under your light. I have an old Ada solar mini light that I do this with because it is way too powerful for the plants I am growing. The light is filtered through the screen. You can even cover up some of the led diodes to reduce the amount of light as well. That is a possibility if the splash shield (piece of plastic protecting the lights doesn’t get extremely hot).

It would benefit you to try to understand how much co2 you are adding to your tank especially if it is pressurized. There are a gazillion threads and posts out there that can help you learn how to do that. As for your java ferns, they love low light. When they start producing new leaves from old leaves isn’t always a sign that they are doing well. Most cases it means, IME, that the plant is reproducing and is starting anew and poor growth is a contributing factor to this. When the plant reproduces from it’s rhizome, you are in business, and that’s a good thing. You can snip those new leaflets and use them and discard the old leaf they are growing from.

Whether your rescape the tank or not is up to you. My main recommendation is to lower your light intensity and manually remove the algae that you see. If that means cutting the leaves off that have collected the algae, especially the bba, then that is what you should do. Plants like Anubias can adapt to some pretty vigorous cleaning and h2o2 treatment, But if the leaves are covered with bba then I say snip them off.

It is going to take time and patience for things to shift. Don’t expect immediate results. Keep up with your water changes and adjust your light settings. Again, your main problem was blasting two units over that tank. Running to just one unit was the right step. How much you reduce the light after that. Is up to you and your plant growth will point you in the right direction. Also study up on co2 and how to add it and diffuse it and measure it in your water. Good luck.
 
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