very importent can some1 help me asap plz

[Alexandra V]

i have a wood viv with slideing glass doors 4 foot long 2 foot high 2 foot deep. and i need a under tank heater but i dont know the best one to get ? and do put it under the tank on the out side ? and do you put it on the warm end of viv ? my cool end is 27c and my warm end 32c what temp is this in 90s ?

Undertank heaters are all around the same quality, so it's just up to you to make sure you regulate it with a thermostat.

Yes, undertank heaters ALWAYS ALWAYS ALWAYS go on the outside of the tank, on the bottom. You would put it on the warm end to make it warm, yes.

Your cool end would be about 80 F, which is perfect, and the warm end is 89 F, which is also good, so I don't believe you'll need an undertank heater to supplement your heat.