Comic Sans Reminds Me Of, Well Me...
The font, Comic Sans MS, is a signature of sorts, kind of from the days when I had to make sure what I wrote was legible, in the long ago days before computer printers and online anything.
The easiest way to control snails is water quality, if you have a snail bloom, it is a message that for whatever reasons your water quality has slipped. The snails I raise as food, I keep in frankly a rather funky tank, one of my favorite tanks, oddly enough.
As I mentioned earlier I really do not have much (if any) experience with bladder snails but there are not many freshwater pond snails that eat healthy live plants, this is an issue that reason is not going to resolve.
If you saw a snail devour and destroy an otherwise healthy robust plant and you are sure of the identification; of course you would never want such a critter anywhere around.
The easy test is a couple dozen mason jars a little of whatever you use for substrate a snail or six, some plants, perhaps give the plants a head start. In some of the jars raise the plants with an abundance of macro and micronutrients. It would be nice for each variation to have several jars (the more the better). Say a set with deficient in iron; different deficiencies for different sets of jars.
Make sure you are doing the same water changes in each, simulate plants with and without CO2, vary the Co2 levels using seltzer water. Each group of jars, one as a control (no snails, or potential miscreant of choice) label each. Keep the same lighting conditions as best you can air stone or a mix a couple times a day, but what you do for one do for all. Partial water changes each day is a good idea. When doing dozens or hundreds you find you become very clever in automating the tasks.
This or some variation is a model to test almost anything, substrate, fertilizer mixtures, CO2 levels, lighting what have you. Remember though for serious research you need dozens if not hundreds of trials. To get a basic idea, a feel, and figure out people trying to swindle you in the advertising, or online posts, it really does not usually take that long.
I actually do some of these with sandwich bags and hang ‘em on a cork board it is easier to track in some tests.
By the way (BTW in online speak) I am confident my little pond snails will pass any honest test, ‘cause I have done them. Still nothing beats trying these things for yourself, even on a small scale.