The loach will eat the shrimp too.

I'd try another fish beisdes the loach if you like the neons.
But you could likely bump things upm to 60 of them, cherrys are fine, they will eat some algae.

Red ark pencils are nicer and red and way cool.
Cost a lot more also.
There are some nicer pencil fish tyou might consider and then add a runner nose pleco, Kuli loaches etc

Regards,
Tom Barr