Well, I suppose since this is low tech, I don't have as much business being in here, but as you are not getting too much responses, I'll offer a guess. Your gut instinct of too much light may be right. That's what I've tended to lean to whenever my algae balance goes awry. So I'll second @Desert Pupfish
's and third your own recommendation of lessening the lighting period. This is especially true if you're running your satellite plus pro at full intensity for 8 hours. Even in my high tech tank in the past, without the proper balance of growing plants in place, 4 hours at full intensity would've been too much. The alternative is to get floaters to shade your plants. This is in line also with @Desert Pupfish
's recommendation of more plants for now.
So cut down that light, keep doing all your other stuff, give it a little more patience (yea another month!
), especially so that you're running a low tech tank, and see if new leaves show up and stay healthy without being taken over by algae. As they do, you can trim off the older, ratty, algae infested leaves, and slowly grow your way out of your algae mess.
As you are waiting, spend some time at this site: https://www.advancedplantedtank.com
especially focusing on: https://www.advancedplantedtank.com/101-lowtech.html
I pretty much repeat this mantra (from the site) all the time to myself as I see the algae pop up:
"Using very strong lighting is like driving a fast car. It could get you to your destination more quickly, or end in an accident. "
There's been variations to this quote, but it holds true when you're starting out.
The one I liked a lot too was:
"Think of light as a gas pedal of a car. The harder you press down on the gas pedal (the more light you have), the faster your car will go (the faster your plants will grow). However, the car will require more regular maintenance (your plants will require more maintenance, i.e. fertilizers, CO2, etc)."
from here: https://www.plantedtank.net/forums/s...php?t=107303#2
In your low tech tank, you have no way of supplying the CO2 that your lighting period is demanding, hence, you have an unbalance that is triggering unhappy plants, which lead to algae. Your only true alternative, then, is to lessen the lighting to meet what CO2 you CAN supply.
Keep on that site and build up to:
and whatever else on that site.
And feel free to come back for clarifications or questions.
And now, here's a darker hole that you may or may not want to go into..
From your pics, it looks like one of your algae is BBA. If you're truly desperate, you can drop a little bit of hydrogen peroxide on the algae during a water change to kill it off. I hesitate to recommend it because it'll usually come back unless you've figured out the root cause and there IS
a risk of harming your fauna. But if you 'really really' are desperate as I was in the past, I would not exceed 2 tbsp per 10 gallons as per this thread: https://www.plantedtank.net/forums/2...treatment.html
. So, I did that 1-2 punch, but I realized it was too harsh. I ended up doing a weird hybrid of it. Whenever I did water changes, when the leaves filled with BBA were exposed, I would just squirt a little h2o2 directly onto the algae. And as stated before, I would measure out 2tbsp per 10 gallons and limit myself to that. If I ran out before I got all the algae, I'll just wait until the next water change before hitting the others. That way, I conservatively hit them all over time.