Swimming critters in a pond near my house (Bangalore, India)

To all the veteran foldscopers this may sound like nothing, but I am sure excited to present this video to you:¬†https://youtu.be/6UOBy8ztLJQ It was hard work. My lens was dirty, and the slides were scratched up, despite my best efforts. Then thanks to Laksiyer and EzekielJakub, who suggested phase contrast, I tilted the foldscope. Lo and…

Can we identify e-coli in water?

I am trying to identify presence/absence of e-coli in a nearby pond. Is this possible to do with foldscope? I have the basic 140x-magnification version. Over here is a video of the aquatic sample I took. although there’s a bunch of stuff “moving” around, all the movement is caused by my efforts to focus the…