Some good warnings there Drew.
No planaria is shrimp safe, just make sure you follow the instructions accurately, if in doubt, use less. A smaller dosage will still work but maybe takes a bit longer. Always follow up with a 2nd treatment a week later. And remember to do water changes a day or two after, to reduce any ammonia spike due to the deaths of the planaria and hydra.
The manual traps will need food in it to work. But it might be a bit overkill if you are going to use No Planaria.
Hard to tell unfortunately. Those tin head spots are just too small.
Unfortunately that thing on her head certainly looks like vorticella. At least that is not fatal. Treatment options can be found in the Shrimp Health and Care subforum.
Are these leeches as you call them, free swimming around, in an "S" shape? Or are they crawling on the glass?
Nematodes swim around in the water current in an S shape.
While Planaria tend to be crawling on the glass.
Just so we are clear with what you are dealing with.
Just a word of advice, squishing Planaria (not nematodes) is a bad idea. A decapitated Planaria will regenerate into two separate Planaria within 14 days. So instead of dealing with one, you have multiple planaria to deal with. Syphoning them out at water change is probably better than squishing them, as tempting as it might be.