i checked my amonia today it was about 2.0. i think it was because i did a water change a couple days a go. what else can it be? please reply.
Wondering how big your tank is?
In an unfiltered tank Ammonia starts to build instantly,
In a 1 day period you can get high levels alone, So in two days I wouldn't be surprised if it was even higher
Alot of betta's in smaller uncycled tanks are left to set for days on end in water that has reached dangerouse levels of ammonia,
The betta will live a shortened life for it.
Also as others pointed out here it may be a good idea to find out what your levels are straight from the tap.