Hello guys! I just finished my first tub setup. After one day, I find there's a swell/bulge at the bottom of the tub where the heat mat attaches. (Oh not sure if that is a correct English expression)... So the bottom of the plastic tub is like a "︵", not a flat "_"... I set the thermostat to around 94F. May I know is this a problem or it's normal? Will the plastic tub break or melt if I keep using it like this? Thank you so much! I asked so many stupid questions...(ಥ﹏ಥ) Ah and this is my tub:
![]()