What will kill planaria, will also kill snails.
If you see 3 or 4 on the glass that means there are tons in the tank. Most tanks have them and most people are not aware that they have them. Once you see them on the glass, there are plenty in the tank. If you go with the no planaria or dog dewormer, remove as many snails as you can or you could end up with an ammonia spike from the decaying snail bodies. Also do not return the snails until several water changes later. I used it on a 2.5 gal tank. And even after totally emptying the tank and replacing the water, the added snails died within a day. It took 3 total gravel washes before the tank was safe for snails again. Since I have snails in all of my tanks, I will not use no planaria again. It did work like a charm on the planaria but within a month the first planaria showed up again. I believe they came via the gravel vac from other tanks. The planaria catcher did not work for me at all. Less food makes a difference but I doubt you will ever totally get rid of the critters. What I also found helpful is adding a flat rock, like slate. Planaria like to hide under flat rocks or decorations during the day. I remove these rocks once a day and wash them off. I am always amazed how many planaria I find this way, when in those tanks I don't even see them otherwise.
that is somewhat depressing to know that i will not get rid of planaria
i do have MTS and they are tiny at the moment. but ill have a hard time trying to get them out =/.. also should i dose dewormer then use carbon to help get rid of the meds?