Yeah, I’ll leave the temperature alone ? The thermometer should be accurate, its a Marina one and just read reviews and none said about it being not accurate.
I’ll keep in a high temperature in the tank, but lower than 28 C, will keep 27 C I think. I’ll have 3 MTS wih him in the tank as well and I know no thing about them.
Nerites, from what I’ve heard are poop machines. My first two died just like that xD Mystery snails are not available in the UK, but yesh, they are awesome snail fwiends ?