CO2 intensity is very well seen in the photo of the diffuser, and do not have to be a child prodigy, which would see the difference with this
Plants began to grow and algae are gone, that's good. But it's been two months after setup! With proper care the plants grow rapidly from the beginning, and algae almost none at the start and very quickly they disappear completely from view.
Now if everything is good, it does not mean it will last forever. I had the same problem with the growth of plants, as you do. Information about an overdose of CO2 in the Internet very little, and the problem with aquariums, many because of this. 1,5-2 bps is a lot, especially after the setup aquarium. 3 bps need for 60 cm. aquarium. In your case, one bps is the maximum dose. After setup need less. In addition to the harmful effects of CO2 on microorganisms, you greatly lower the pH level and the plants also suffer because of this.
Otherwise, how do you explain such a poor condition your plants for two months, if you do everything correctly and use only original products ADA? Do not look into the causes of problems, you will soon get them again.
It looked like my tank after setup,
and to look like in two months
From the beginning, had no problems with algae or the growth of plants.
Doing all the instructions ADA. Added the original fertilizer according to instructions, in the recommended dose (1 ml for each fertilizer). And I am fully confident that if I added CO2 in the quantities that you make, I would have the same problems with the aquarium as you.