tub not a option, tank size?

[cmack91]

I bought this type of tub




and this (should I get something better?)

those are crap, i have one and theyre an on/off type from what i can tell, my temps fluctuate from 85-94. i just got this from home depot for $11, and i dont have it installed yet, but i was messing with a light plugged into it, and its a pulse type for sure, but mess with it first, cause i have to turn mine almost half way on before it activates and then i can turn it down