I have 4 Amano Shrimp in my tank. They're brilliant characters. They do like to hide alot once they've settled in but do make the odd apearance. They're amazing to watch, I could spend hours staring at them
They have been known to swipe whole algae waffers and haul them away back to their lairs. lol.
Amano shrimp are brilliant for a tank, I have 8 in my tank, I rarely feed them specifically because they just clean and feed from leftover food they clean and clean like 24 hours a day 7 days a week. As flapping says tho if i put in a broken algae wafer, usually one of the big shrimp will drag it away to their evil hideout lol.
They are not just brown -_- they are transparent and have markings down their back, they also have these little white oval eyes on their tails, they are great.
I would advise these totally and I dont think they would be too worried about 1 degree.. to be honest a tanks temperature is never going to be 100% equal all the way throughout the tank, there are bound to be cooler and warmer spots.