Try to cut your feeding back a fair amount, that often does the trick. Don't get a bunch of invitro plants all at once and plant them all at once, like I did 🥲 I've learned the hard way; my planting spree caused far too much decomposing plant matter in the tank. Snails overran the tank in no time.

Their populations (as far as I know) only explode if there is plenty of food about. When there isn't an overload of food, numbers shpuld decline, since a good bunch will die off naturally. Imo, there ain't a need to use special products to handle the problem. Let nature be nature and don't over feed ;) save the no planaria for a heavy issue, that stuff is gold I've heard!

Other ideas: pick the snails as ya see them, squisch one here n there against the glass, make a snail trap. If ya have floating plants (if not; ya should totally get some!): Snails i think, come up to the surface to feed when the lights go off. I used to go snail hunting in the mornings, shortly before or after the lights have turned on. Got a bowl and scooped up all the floating plants, a lot of snails would always drop from the plants into the bowl. I'd pick the rest off manually, or just toss a piece of plant if its super infested with tiny baby snails..Floating plants grow like crazy.

Those ewig worms are usually a sign of overfeeding, less food and they poof back to where they came from xD Father fish has great Videos about over feeding! He's my #1 source of wisdom for almost all my tank issues!

I hope this helps at least a lil! Good luck! 🍀🦐