In my experience, frequent water changes has done nothing to prevent algae so there are probably many variables at work. I don't bombard my tanks with a lot of light which may be why WCs don't have any correlation with algae in my tanks.
Also, I've never experienced any kind of plant melt with all
of the plants I've ever had and all of them were terrestrially grown except for most of the stem plants.
As for ADA dosing, they sell fertz but their instructions follow a time period when the nutrients in the soil approximately run out.
But as for all of this, since you're new to it, you should experiment. I still experiment trying to see how plants respond best to the amounts of certain nutrients. Many deficiencies can be easily corrected just by adding back the deficient nutrient. Waiting for deficiencies allows you to learn a lot about specific plant requirements as well as just how low you can dose. That's what I do whenever I get a new plant.
Lastly, check your water quality report from your utilities company. If you have Hetch-Hetchy water, it's pretty clean and many plants thrive in it, especially the ones you have. Some other cities in the BA have very hard water and many plants struggle to grow in it.
1st, check WQ report for your tap to know what's in it.
2nd, experiment to learn about plant requirements. This isn't for those who subscribe to the KISS principle, however.
Addendum regarding EI: a lot of people think EI requires large WCs. This is not true. Tom Barr said many times that if you want to KISS, use EI and do large WCs. It's easy and requires very little effort to follow instructions. But if you slowly dial back the amount of certain fertz until deficiency occurs, you'll have found the lower limit of the plants. Just increase it back one level before and plants will be fine and you can go much longer without having to do WCs.
Am totally forgot the ADA fertilizes.
I noticed you are my neighbor. are you around AFA ?
Yes, I am. I need to go there to buy a new plant soon.
Anyway, if you need fertz, visit aquariumfertilizer.com and you can buy some dry fertz. Skip the magnesium sulfate ($3) as it's cheaper to buy it at Safeway (4lbs/$4=$1/lb).
KNO3 (nitrogen and potassium)