Big vote to join the local club.
It'll make things about 10-100X easier.
Save you lots of $ as well.
EI is namely used to rule out a limitation, it does imply you require or need such concentrations. However, having them should not be an issue if you have good light, CO2 levels.
If you have troubles with CO2, then that's not the dosing's fault, that's the CO2/your fault.
Generally for your tank once you get CO2 going, about 1/2 the suggested EI ought to help and large weekly water changes are very wise for folks with larger well fed fish.
Ask any breeder.
Of course some will suggest otherwise, suggesting less is better as far as nutrients, however, they balk and go the other way when it comes to the basic water change which even non planted folks know is a good idea for fish health.
Seems contradictory, but I generally do not suggest it due to the trade offs and the test/complexity.
Non CO2 methods I do not suggets water changes, but here we have a balanaced low fish load and much slower plant growth, so the biology can easily keep pace with the fish food/waste.
So that's the trade off there, and not a bad one either, but you will not be able to keep the fish load an feeding routine you presently have as the trade off.
In general, more plants and less fish = better place for fish.
So if you add more plants, it'll help the fish's environment.
More O2, less NH4 and nice look.