Fair enough, it is a thermostat. It's on/off which isn't as good as proportional. Which means, to me, that it's going to have a certain degree of sway (a +/- of as little as 1 to as many as 4) from the temp you have it set too.

It's cheap, and that's the key. Sure, you can save a little money, but it will eventually wear out and it looks poorly constructed.

I recommend herpstats, they have more safety features and are proportional (pulsing electricity to the heating element to maintain the temp desired). My herpstat right now is accurate to within 0.02 degrees of my set temps I want in my tubs.

Pros: it's grounded...at least.

Cons: made of cheap plastic
Has a rotary dial to set temp (seems cheaply constructed from pictures)
I'm not sure of a warranty?

It looks like a supped up hydrofarm farm, and those have a large +/- 5 degree sway. Goes five or so over your set temp, drops 5 or so below then kicks back on.

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